Question

A sign says that the price on all music equipment is 30% off the original price. you buy an electric guitar for the sale price of $315.

A-what is the original price?
B-How much money did you save off of the original price?
C-What percent of the original price is the sale price?

Answer 1

A. 30% + $315 = $409.5
B. $315 - $409.5 = 94.5
C. 70%

Answer 2

Explanation:

sale price = original price minus discount.

discount = original price * discount percent / 100.

let s represent the sale price.

let p represent the original price.

let d represent the discount.

let k represent the discount percent.

the above formulas become:

s = p - d

d = p * k/100

we know that s = 315.

we know that k = 30.

formulas become:

315 = p - d

d = p * 30/100

simplify these formulas to get:

315 = p - d

d = .3p