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Find the Percentage Change, When a Number is Changed from : 100 to 80 - Mathematics

Sum

Find the percentage change, when a number is changed from :
100 to 80

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Solution

Original number = 100
New number = 80
Change
=(100 - 80)
= 20
∴ Percentage change (decrease)
= `(20)/(100) xx 100`
= 20%

Concept: Concept of Percent and Percentage
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 7 Percent and Percentage
Exercise 7 (A) | Q 5.2 | Page 82
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