Question

A number is increased by 20% and then it is decreased by20% . Find the next increase or decrease percent

Answer 1

Step-by-step explanation:

Let the initial number be 100.

On increasing 100 by 20%

Resulting number = 100 + 20% of 100

$= 100 + \frac {20}{100} \times 100\\</p><p>=100+20=120$

$\therefore$ Resulting number = 120

$\because$ Resulting number is decreased by 20%

$\therefore$ New Number

$= 120 - \frac {20}{100} \times 120\\</p><p>=100-24 = 96$

Now net decrease in no. =original number - New number = 100 - 96= 4

$percentage \: decrease \\= \frac{net \: decrease \: in \: number}{original \: number} \times 100 \\ = \frac{4}{100} \times 100 \\ = 4 \% \:$

Answer 2

Answer:

it is

Step-by-step explanation:

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