Question

Javier bought a microwave for $150. The cost was 30% off the original price, what was the original price

Answer 1

$150 / 30% or $150 / 0.30 (they are the same thing)

Your answer is $500

Hope this helps!

Answer 2

Answer:

The price of the microwave before the sale was $150

Step-by-step explanation:

The formula to calculate percentage change between two time periods is p=N−OO⋅100 where p is the percentage change, N is the new price and O is the old price.

In this problem we have been given the percentage change (p=−30%) and the new price (N=105). Substituting these into the formula and solving for O while keeping the equation balanced gives:

−30=105−OO⋅100

−30100=105−OO⋅100100

−0.3=105−OO

−0.3=105O−OO

−0.3=105O−1

1−0.3=105O−1+1

0.7=105O

0.7O=105OO

0.7O=105

0.7O0.7=1050.7

O=15