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

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Question

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

Sum
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Solution

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

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Chapter 7: Percent and Percentage - Exercise 7 (A) [Page 82]

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