# Selina solutions for Concise Mathematics Class 7 ICSE chapter 8 - Percent and Percentage [Latest edition]

## Chapter 8: Percent and Percentage

Exercise 8 (A)Exercise 8 (B)Exercise 8 (C)
Exercise 8 (A)

### Selina solutions for Concise Mathematics Class 7 ICSE Chapter 8 Percent and Percentage Exercise 8 (A)

Exercise 8 (A) | Q 1.1

Express the following as percent: 3/4

Exercise 8 (A) | Q 1.2

Express the following as percent: 2/3

Exercise 8 (A) | Q 1.3

Express the following as percent: 0.025

Exercise 8 (A) | Q 1.4

Express the following as percent: 0.125

Exercise 8 (A) | Q 1.5

Express the following as percent: 3/8

Exercise 8 (A) | Q 1.6

Express the following as percent: 0.25

Exercise 8 (A) | Q 2.1

Express the following percentage as a fraction and as a decimal number:

7 1/2 %

Exercise 8 (A) | Q 2.2

Express the following percentage as a fraction and as a decimal number:

2.50 %

Exercise 8 (A) | Q 2.3

Express the following percentage as a fraction and as a decimal number:

0.02 %

Exercise 8 (A) | Q 2.4

Express the following percentage as a fraction and as a decimal number:

175 %

Exercise 8 (A) | Q 2.5

Express the following percentage as a fraction and as a decimal number:

5 %

Exercise 8 (A) | Q 2.6

Express the following percentage as a fraction and as a decimal number:

25 %

Exercise 8 (A) | Q 3.1

What percent is: 16 hours of 2 days?

Exercise 8 (A) | Q 3.2

What percent is: 40 paisa of Rs. 2?

Exercise 8 (A) | Q 3.3

What percent is: 25 cm of 4 metres

Exercise 8 (A) | Q 3.4

What percent is: 600 gm of 5 kg?

Exercise 8 (A) | Q 4.1

Find the value of: 5% of Rs. 350

Exercise 8 (A) | Q 4.2

Find the value of 10% of Rs. 400.40

Exercise 8 (A) | Q 4.3

Find the value of 1% of Rs. 500

Exercise 8 (A) | Q 4.4

Find the value of 12 1/2 % of 80 kg

Exercise 8 (A) | Q 4.5

Find the value of 5/8 % of Rs. 600.

Exercise 8 (A) | Q 4.6

Find the value of 33 1/3 % of 27 m

Exercise 8 (A) | Q 5

In a class of 60 children, 30% are girls. How many boys are there?

Exercise 8 (A) | Q 6

In an election, two candidates A and B contested. A got 60% of the votes. The total votes polled were 8000. How many votes did each get?

Exercise 8 (A) | Q 7

A person saves 12% of his salary every month. If his salary is ₹2,500, find his expenditure.

Exercise 8 (A) | Q 8

Seeta got 75% marks out of a total of 800. How many marks did she lose ?

Exercise 8 (A) | Q 9

A shop worth ₹25,000 was insured for 95% of its value. How much would the owner get in case of any mishappening?

Exercise 8 (A) | Q 10

A class has 30 boys and 25 girls. What is the percentage of boys in the class?

Exercise 8 (A) | Q 11.1

Express: 3 2/5 as a percent.

Exercise 8 (A) | Q 11.2

Express: 0.0075 as a percent.

Exercise 8 (A) | Q 11.3

Express: 3 : 20 as percent.

Exercise 8 (A) | Q 11.4

Express: 60 cm as percent of 1 m 25 cm

Exercise 8 (A) | Q 11.5

Express: 9 hours as a percent of 4 days.

Exercise 8 (A) | Q 12.1

Find 2% of 2 hours 30 min

Exercise 8 (A) | Q 12.2

What percent of 12 kg is 725 gm?

Exercise 8 (B)

### Selina solutions for Concise Mathematics Class 7 ICSE Chapter 8 Percent and Percentage Exercise 8 (B)

Exercise 8 (B) | Q 1

Deepak bought a basket of mangoes containing 250 mangoes 12% of these were found to be rotten. Of the remaining, 10% got crushed. How many mangoes were in good condition?

Exercise 8 (B) | Q 2

In a Maths Quiz of 60 questions, Chandra got 90% correct answers and Ram got 80% correct answers. How many correct answers did each give? What percent is Ram’s correct answers to Chandra’s correct answers?

Exercise 8 (B) | Q 3

In an examination, the maximum marks are 900. A student gets 33% of the maximum marks and fails by 45 marks. What is the passing mark? Also, find the pass percentage.

Exercise 8 (B) | Q 4

In a train, 15% of people travel in the first class, 35% travel in second class. The balance travel in the A.C. class? Calculate the percentage of A.C. class travelers?

Exercise 8 (B) | Q 5

A boy eats 25% of the cake and gives away 35% of it to his friends. What percent of the cake is still left with him?

Exercise 8 (B) | Q 6

What is the percentage of vowels in the English alphabet?

Exercise 8 (B) | Q 7.1

6 1/4% of what number is 375?

Exercise 8 (B) | Q 7.2

0.2 % of a number is 5. Find the number.

Exercise 8 (B) | Q 7.3

30 is 16 2/3% of a number. Find the number.

Exercise 8 (B) | Q 8

The money spent on the repairs of a house was 1% of its value. If the repair, costs Rs. 5,000, find the cost of the house.

Exercise 8 (B) | Q 9

In a school out of 300 students, 70% are girls and 30% are boys. If 30 girls leave and no new boy is admitted, what is the new percentage of girls in the school?

Exercise 8 (B) | Q 10

Kumar bought a transistor for Rs. 960. He paid 12 % cash money. The rest he agreed to pay in 12 equal monthly instalments. How much will he pay each month?

Exercise 8 (B) | Q 11

An ore contains 20% zinc. How many kg of ore will be required to get 45 kg of zinc?

Exercise 8 (C)

### Selina solutions for Concise Mathematics Class 7 ICSE Chapter 8 Percent and Percentage Exercise 8 (C)

Exercise 8 (C) | Q 1

The salary of a man is increased from Rs. 600 per month to Rs. 850 per month. Express the increase in salary as percent.

Exercise 8 (C) | Q 2.1

Increase: 60 by 5%

Exercise 8 (C) | Q 2.2

Increase: 20 by 15%

Exercise 8 (C) | Q 2.3

Increase: 48 by 12 1/2 %

Exercise 8 (C) | Q 2.4

Increase: 80 by 140%

Exercise 8 (C) | Q 2.5

Increase: 1000 by 3.5%

Exercise 8 (C) | Q 3.1

Decrease: 80 by 20%

Exercise 8 (C) | Q 3.2

Decrease: 300 by 10%

Exercise 8 (C) | Q 3.3

Decrease: 50 by 12.5 %

Exercise 8 (C) | Q 4.1

What number: When increased by 10% becomes 88?

Exercise 8 (C) | Q 4.2

What number: When increased by 15% becomes 230?

Exercise 8 (C) | Q 4.3

What number: When decreased by 15% becomes 170?

Exercise 8 (C) | Q 4.4

What number: When decreased by 40% becomes 480?

Exercise 8 (C) | Q 4.5

What number: When increased by 100% becomes 100?

Exercise 8 (C) | Q 4.6

What number: When decreased by 50% becomes 50?

Exercise 8 (C) | Q 5

The price of a car is lowered by 20% to Rs. 40,000. What was the original price? Also, find a reduction in price.

Exercise 8 (C) | Q 6

If the price of an article is increased by 25%, The increase is Rs. 10. Find a new price.

Exercise 8 (C) | Q 7

If the price of an article is reduced by 10%, the reduction is Rs. 40. What is the old price?

Exercise 8 (C) | Q 8

The price of a chair is reduced by 25%. What is the ratio of:

(i) Change in price to the old price.
(ii) Old price to the new price.

Exercise 8 (C) | Q 9.1

If x is 20% less than y, find : "x"/"y"

Exercise 8 (C) | Q 9.2

If x is 20% less than y, find : ("y" - "x")/"y"

Exercise 8 (C) | Q 9.3

If x is 20% less than y, find : "x"/("y" - "x")

Exercise 8 (C) | Q 10.1

If x is 30% more than y; find : "x"/"y"

Exercise 8 (C) | Q 10.2

If x is 30% more than y; find : ("y" + "x")/"x"

Exercise 8 (C) | Q 10.3

If x is 30% more than y; find : "y"/("y" - "x")

Exercise 8 (C) | Q 11

The weight of a machine is 40 kg. By mistake it was weighed as 40.8 kg. Find the error percent.

Exercise 8 (C) | Q 12

From a cask, containing 450 litres of petrol, 8% of the petrol was lost by leakage and evaporation. How many litres of petrol was left in the cask?

Exercise 8 (C) | Q 13

An alloy consists of 13 parts of copper, 7 parts of zinc and 5 parts of nickel. What is the percentage of each metal in the alloy?

Exercise 8 (C) | Q 14

In an examination, first division marks are 60%. A student secures 538 marks and misses the first division by 2 marks. Find the total marks of the examination.

Exercise 8 (C) | Q 15

Out of 1200 pupils in a school, 900 are boys and the rest are girls. If 20% of the boys and 30% of the girls wear spectacles, find :

(i) how many pupils in all, wear spectacles?

(ii) what percent of the total number of pupils wear spectacles?

Exercise 8 (C) | Q 16

Out of 25 identical bulbs, 17 are red, 3 are black and the remaining are yellow. Find the difference between the numbers of red and yellow bulbs and express this difference as percent.

Exercise 8 (C) | Q 17

A number first increases by 20% and then decreases by 20%. Find the percentage increase or decrease on the whole.

Exercise 8 (C) | Q 18

A number is first decreased by 40% and then again decreased by 60%. Find the percentage increase or decrease on the whole.

Exercise 8 (C) | Q 19

If 150% of a number is 750, find 60% of this number.

## Chapter 8: Percent and Percentage

Exercise 8 (A)Exercise 8 (B)Exercise 8 (C)

## Selina solutions for Concise Mathematics Class 7 ICSE chapter 8 - Percent and Percentage

Selina solutions for Concise Mathematics Class 7 ICSE chapter 8 (Percent and Percentage) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Concise Mathematics Class 7 ICSE solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Concise Mathematics Class 7 ICSE chapter 8 Percent and Percentage are Concept of Percent and Percentage, Concept for Understanding Percentage as a Fraction with Denominator 100, Converting Decimals to Percentage, Converting Fractional Numbers to Percentage.

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