Question

A number is increased by 20 percent and the increased number is decreased by 20 percent.Find the net increase or decrease percent​

Answer 1

Answer:

let the actual is =X

now increase 20 percent

new no.is

=120x/100=6x/5

now again decreased by 20 percent

so no.becomes..

=

$= \frac{6x}{5} \times \frac{80}{100} \\ = \frac{24x}{25}$

now decreaseb in value is =x-(24x/25)=X/25

resultant decreased percentage.....

$\frac{ \frac{x}{25} }{x} \times 100 = 4 \: \: percent$