How we worked it out
Updated as you change the numbers.
- 15% of 80 = 15 ÷ 100 × 80.
Method and assumptions
A percent is a number out of 100. Percent change compares the new value with the old one; percent difference compares two values with neither as the reference, so it uses their average. A rise of 50% followed by a fall of 50% does not return to the start.
Questions
What is 15% of 80?
12.
What is the percent change from 80 to 100?
A 25% increase.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.