An online shopping site reduced the price of one
computer model by 25 percent for a sale. By what
percentage of the sales price must it be increased
to put the computer model back at its original price?
Suppose the computer originally cost $100.00. With
the 25% deduction, it would cost $75.00. To bring
the price back to the original $100.00, you'd have
to add $25.00, which is 1/3 of $75 — or 33.3%.