Question

I. Find the percentage change, when a number is changed form:

1) 80 to 100
2) 100 to 80​

Answer 1

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(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%...

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Answer 2

Answer:

$\huge\bold\pink\star\rm\pink{Question}\bold\pink\star$

I. Find the percentage change, when a number is changed form:1) 80 to 100

2) 100 to 80

$\huge\bold\star\tt\color{purple}{Ans}\color{blue}{wer}$

1) 80 to 100

Original number = 80

New number = 100

Change

= (100-80)

= 20

∴ Percentage change (increase)

= 20/80 × 100

= 25%

2) 100 to 80

Original number = 100

New number = 80

Change

= (100-80)

= 20

∴ Percentage change (decrease)

= 20/100 ×100

= 20