Practice Percent Change in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The ratio of the change in a quantity to the original value, expressed as a percentage.
If a price goes from \50 to \60, the change is \10. Compared to the original \50, that's \frac{10}{50} = 20\% increase.
Example 1
easyA jacket originally costs \60 and is on sale for \45. What is the percent decrease?
Example 2
mediumA town's population grew from 12{,}000 to 15{,}000. What is the percent increase?
Example 3
hardA stock price rises by 20\% one year and falls by 20\% the next year. If it started at \100$, what is the final price and the overall percent change?
Example 4
easyA shirt's price increases from \25 to \30. What is the percent increase?
Example 5
mediumAfter a 15\% discount, a laptop costs \680$. What was the original price?