Question

A number is first increased by 20% and then decreased by 15%. Find the net increase or

decrease percent.

Answer 1

let no be 100
increased no =120
15% of 120 decreased
=
$\frac{85}{100} \times 120 = 102$
percent is increased by 2

Answer 2

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

• Let the Number be 100.

➟ 100 × (100 + 20)% × (100 - 15)%

➟ 100 × 120% × 85%

➟ 100 × $\large\tt{\frac{120}{100}}$ × $\large\tt{\frac{85}{100}}$

➟ 100 × $\large\tt{\frac{12}{10}}$× $\large\tt{\frac{17}{20}}$

➟ 10 × 12 × $\large\tt{\frac{17}{20}}$

➟ 102%

2% increase