Question

A backpack is normally $64.99,but sale,it is marked down to $45.49.what percent off is the sale price?

Answer 1

30%

Explanation:

Here we want to setup the equation

`y = a - (a* x)`

where y is the discounted price, a is the normal price and x is the percent off. so now we wanna plug in known values and solve for percent off.

`45.49 = 64.99 - (64.99x)`

through algebra,

`- 19.5 = - (64.99x)`

`( - 19.5)/( - 64.99) = x`

`x = .3000...`

so in percentage that is 30%