Can you privde the formula

Question

need formula to calculate the original price of an item if the sale price is $63 after a 30% discount

Answer 1

Discounting something by 30% means you pay 70%

So $63=70% of X

where X is the "original price"

$63=.7 * X

X=$63/.7

X= $90

Answer 2

(Original Price) = (Sale Price) x (1+discount percentage)

(Original Price) = ($63) x (1.30)

(Original Price) = $81.90