Question

a number is increased by 30% and then decreased by 30%. find the net increase or decrease percent

Answer 1

Answer:

Since we have given that

A number is increased by 30%.

Then a number is decreased by 30%.

Let x = 30%

y = -30%

So, the net increase or decrease percent would be

$: \implies \: x - y - \frac{xy}{100} \\ \\ : \implies30 - 30 = \frac{30 \times 30}{100} \\ \\ : \implies - \frac{900}{100} = - 9\%$