Calculate the percent change in each problem below. Homework Help ✎
Robert wanted to buy a computer game that cost $25 last week. This week when he went back to buy the game, the price was $35. What was the percent of increase in the price?
Susan bought a jacket on sale. The original price of $35 was marked down to $25. What was the percent discount because of the sale?
Why were your answers to parts (a) and (b) different?
Find the increase in the price and find it as a percentage of the original price.
Increase: $35 − $25 = $10
$10 = (x)($25)
Follow the same strategy to find the percent discount. Remember, the percent discount is with respect to the original price.
The percent increase is the amount the price increased as a percentage of the original cost.
Each percentage is based on different original prices.