Question

Mr. Stevens saved $30 buying a computer at 15% off. What was the original price of the computer?

Answer 1

15% = $30

1% = 30 ÷ 15
1% = $2

100% = 2 x 100
100% = $200

Answer: The original price of the computer is $200.

Answer 2

Assume original price = x
According to the question, x - (x × 0.15) = x - 30
=> x - x - 0.15x = - 30
=> - 0.15x= - 30
=> x = -30/-0.15
x = $200