Percents & Ratios¶ Basics What is 40% of 90? 15% of what number is 60? 120 is what percent of 80? Find \(x\%\) of \(y\) Percent change Increase Decrease Interest Simple Interest Compound Interest Ratios Equivalent ratios Portioning Combining ratios Last Updated: 2024-05-14 ; Contributors: AhmedThahir Comments