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# RD Sharma solutions for Class 8 Mathematics chapter 12 - Percentage

## Mathematics for Class 8 by R D Sharma (2019-2020 Session)

#### RD Sharma Mathematics Class 8 by R D Sharma (2019-2020 Session) ## Chapter 12: Percentage

Ex. 12.10Ex. 12.20

#### Chapter 12: Percentage Exercise 12.10 solutions [Page 2]

Ex. 12.10 | Q 1.01 | Page 2

Write the following as percent:
$\frac{7}{25}$

Ex. 12.10 | Q 1.02 | Page 2

Write the following as percent:
$\frac{14}{625}$

Ex. 12.10 | Q 1.03 | Page 2

Write the following as percent:
$\frac{5}{8}$

Ex. 12.10 | Q 1.04 | Page 2

Write the following as percent:
0.8

Ex. 12.10 | Q 1.05 | Page 2

Write the following as percent:
0.005

Ex. 12.10 | Q 1.06 | Page 2

Write the following as percent:
3 : 25

Ex. 12.10 | Q 1.07 | Page 2

Write the following as percent:
11 : 80

Ex. 12.10 | Q 1.08 | Page 2

Write the following as percent:
111 : 125

Ex. 12.10 | Q 1.09 | Page 2

Write the following as percent:
13 : 75

Ex. 12.10 | Q 1.1 | Page 2

Write the following as percent:
15 : 16

Ex. 12.10 | Q 1.11 | Page 2

Write the following as percent:
0.18

Ex. 12.10 | Q 1.12 | Page 2

Write the following as percent:

$\frac{7}{125}$
Ex. 12.10 | Q 2.1 | Page 2

Convert the following percentage to fractions and ratio:
25%

Ex. 12.10 | Q 2.2 | Page 2

Convert the following percentage to fractions and ratio:
2.5%

Ex. 12.10 | Q 2.3 | Page 2

Convert the following percentage to fractions and ratio:
0.25%

Ex. 12.10 | Q 2.4 | Page 2

Convert the following percentage to fractions and ratio:
0.3%

Ex. 12.10 | Q 2.5 | Page 2

Convert the following percentage to fractions and ratio:
125%

Ex. 12.10 | Q 3.1 | Page 2

Express the following as decimal fractions:
27%

Ex. 12.10 | Q 3.2 | Page 2

Express the following as decimal fractions:
6.3%

Ex. 12.10 | Q 3.3 | Page 2

Express the following as decimal fractions:
32%

Ex. 12.10 | Q 3.4 | Page 2

Express the following as decimal fractions:
0.25%

Ex. 12.10 | Q 3.5 | Page 2

Express the following as decimal fractions:
7.5%

Ex. 12.10 | Q 3.6 | Page 2

Express the following as decimal fractions:
$\frac{1}{8} %$

#### Chapter 12: Percentage Exercise 12.20 solutions [Pages 9 - 10]

Ex. 12.20 | Q 1.1 | Page 9

Find: 22% of 120

Ex. 12.20 | Q 1.2 | Page 9

Find: 25% of Rs 1000

Ex. 12.20 | Q 1.3 | Page 9

Find: 25% of 10 kg

Ex. 12.20 | Q 1.4 | Page 9

Find: 16.5% of 5000 metre

Ex. 12.20 | Q 1.5 | Page 9

Find: 135% of 80 cm

Ex. 12.20 | Q 1.6 | Page 9

Find: 2.5% of 10000 ml

Ex. 12.20 | Q 2.1 | Page 9

Find the number a, if 8.4% of a is 42

Ex. 12.20 | Q 2.2 | Page 9

Find the number a, if 0.5% of a  is 3

Ex. 12.20 | Q 2.3 | Page 9

Find the number a, if $\frac{1}{2} %$ of a is 50

Ex. 12.20 | Q 2.4 | Page 9

Find the number a, if 100% of a is 100

Ex. 12.20 | Q 3 | Page 9

x is 5% of y, y is 24% of z. If x = 480, find the values of y and z.

Ex. 12.20 | Q 4 | Page 9

A coolie deposits Rs 150 per month in his post office Savings Bank account. If this is 15% of his monthly income, find his monthly income.

Ex. 12.20 | Q 5 | Page 9

Asha got 86.875% marks in the annual examination. If she got 695 marks, find the total number of marks of the examination.

Ex. 12.20 | Q 6 | Page 9

Deepti went to school for 216 days in a full year. If her attendance is 90%, find the number of days on which the school was opened.

Ex. 12.20 | Q 7 | Page 9

A garden has 2000 trees. 12% of these are mango trees, 18% lemon and the rest are orange trees. Find the number of orange trees.

Ex. 12.20 | Q 8 | Page 10

Balanced diet should contain 12% of proteins, 25% of fats and 63% of carbohydrates. If a child needs 2600 calories in this food daily, find in calories the amount of each of these in his daily food intake.

Ex. 12.20 | Q 9 | Page 10

A cricketer scored a total of 62 runs in 96 balls. He hit 3 sixes, 8 fours, 2 twos and 8 singles. What percentage of the total runs came in
(i) Sixes
(ii) fours
(iii) twos
(iv) singles

Ex. 12.20 | Q 10 | Page 10

A cricketer hit 120 runs in 150 balls during a test match. 20% of the runs came in 6's, 30% in 4's, 25% in 2's and the rest in 1's. How many runs did he score in
(i) 6's
(ii) 4's
(iii) 2's
(iv) singles
What % of his shots were scoring ones?

Ex. 12.20 | Q 11 | Page 10

Radha earns 22% of her investment. If she earns Rs 187, then how much did she invest?

Ex. 12.20 | Q 12 | Page 10

Rohit deposits 12% of his income in a bank. He deposited Rs 1440 in the bank during 1997. What was his total income for the year 1997?

Ex. 12.20 | Q 13 | Page 10

Gunpowder contains 75% nitre and 10% sulphur. Find the amount of the gunpowder which carries 9 kg nitre. What amount of gunpowder would contain 2.3 kg sulphur?

Ex. 12.20 | Q 14 | Page 10

An alloy of tin and copper consists of 15 parts of tin and 105 parts of copper. Find the percentage of copper in the alloy?

Ex. 12.20 | Q 15 | Page 10

An alloy contains 32% copper, 40% nickel and rest zinc. Find the mass of the zinc in 1 kg of the alloy.

Ex. 12.20 | Q 16 | Page 10

A motorist travelled 122 kilometres before his first stop. If he had 10% of his journey to complete at this point, how long was the total ride?

Ex. 12.20 | Q 17 | Page 10

A certain school has 300 students, 142 of whom are boys. It has 30 teachers, 12 of whom are men. What percent of the total number of students and teachers in the school is female?

Ex. 12.20 | Q 18 | Page 10

Aman's income is 20% less than that of Anil. How much percent is Anil's income more than Aman's income?

Ex. 12.20 | Q 19 | Page 10

The value of a machine depreciates every year by 5%. If the present value of the machine be Rs 100000, what will be its value after 2 years?

Ex. 12.20 | Q 20 | Page 10

The population of a town increases by 10% annually. If the present population is 60000, what will be its  population after 2 years?

Ex. 12.20 | Q 21 | Page 10

The population of a town increases by 10% annually. If the present population is 22000, find its population a year ago.

Ex. 12.20 | Q 22 | Page 10

Ankit was given an increment of 10% on his salary. His new salary is Rs 3575. What was his salary before increment?

Ex. 12.20 | Q 23 | Page 10

In the new budget, the price of petrol rose by 10%. By how much percent must one reduce the consumption so that the expenditure does not increase?

Ex. 12.20 | Q 24 | Page 10

Mohan's income is Rs 15500 per month. He saves 11% of his income. If his income increases by 10%, then he reduces his saving by 1%, how much does he save now?

Ex. 12.20 | Q 25 | Page 10

Shikha's income is 60% more than that of Shalu. What percent is Shalu's income less than Shikha's?

Ex. 12.20 | Q 26 | Page 10

Rs 3500 is to be shared among three people so that the first person gets 50% of the second, who in turn gets 50% of the third. How much will each of them get?

Ex. 12.20 | Q 27 | Page 10

After a 20% hike, the cost of Chinese Vase is Rs 2000. What was the original price of the object?

## Chapter 12: Percentage

Ex. 12.10Ex. 12.20

#### RD Sharma Mathematics Class 8 by R D Sharma (2019-2020 Session) ## RD Sharma solutions for Class 8 Mathematics chapter 12 - Percentage

RD Sharma solutions for Class 8 Maths chapter 12 (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 CBSE Mathematics for Class 8 by R D Sharma (2019-2020 Session) solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Class 8 Mathematics chapter 12 Percentage are Recalling Ratios and Percentages, Finding the Increase Or Decrease per Cent, Concept of Finding Discounts, Finding Discounts - Estimation in Percentages, Prices Related to Buying and Selling (Profit and Loss), Finding Cost Price/Selling Price, Profit %/Loss%, Sales Tax/Value Added Tax, Conept of Compound Interest, Deducing a Formula for Compound Interest, Rate Compounded Annually Or Half Yearly (Semi Annually), Applications of Compound Interest Formula, Calculation of Percentage, Decimal Fraction, Concept of Percentage.

Using RD Sharma Class 8 solutions Percentage exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in RD Sharma Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 8 prefer RD Sharma Textbook Solutions to score more in exam.

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