Question

a number is increased by 20 % and then decreased by 20 %. find the net increase or decrease percent?

Answer 1

Dear for your brainic help the answer is there is %, net increase percent .
$let \: x \: be \: the \: number \: \\ 20\%increase \: = x + 20 x \div 100 = 120x \div 100 \\ 20\%decease \: = 120 - 20 \div 100 = 100\%increase \:$

Answer 2

$\large\green{\textbf{\underline{\underline{Here\:is\:your\:Answer :- }}}}$

• Let the Number be 100.

➟ 100 × (100 + 20)% × (100 - 20)%

➟ 100 × 120% × 80%

➟ 100 × $\large\tt{\frac{120}{100}}$ × $\large\tt{\frac{80}{100}}$

➟ 100 × $\large\tt{\frac{12}{10}}$× $\large\tt{\frac{8}{10}}$

➟ 1 × 12 × 8

➟ 96%