Question

find the percentage change, when a number is changed from : i) 100 to 80 , ii) 6.25 to 7.50​

Answer 1

Answer:

a) X

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

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asked May 6, 2019 in Class VIII Maths by aditya23 (-2,146 points)

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

(i) 80 to 100

(ii) 100 to 80

(iii) 6.25 to 7.50

percent and percentage

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answered May 6, 2019 by navnit40 (-4,939 points)

(i) Original number = 80

New Number = 100,

Change = (100 – 80) = 20

∴ Percentage change (increase)

= 20/80 × 100 = 25%

(ii) Original number = 100

New number = 80

Change (100 – 80) = 20

∴ Percentage change (decrease) = 20/100 × 100 = 20%

(iii) Original number = 6. 25,

New number = 7.50

Change (increase) = (7. 50 – 6. 25) = 1. 25

∴ Increase = 1.25/6.25 × 100 = 20%