Question

25% off its price in a sale. A dress is £90 in the sale. How much it before the price reduction?

Answer 1

Let the price before be x

$\frac{x-90}{x}$ × 100 = 25 ( this is the formula for percentage increase / decrease )

$\frac{100 ( x - 90}{x}$ = 25

25 x = 100 x - 9000

100 x - 25 x = 9000

75 x = 9000

∴ x = 120

So the price before was £ 120.00

HOPE IT HELPS AND PLZ MARK BRAINLIEST