DDesmos SAT Prep
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Percent Word Problems

Chain percent calculations in a single typed expression.

The Desmos trick

Type the entire percent calculation as one expression instead of converting percents to decimals by hand — Desmos evaluates it immediately, and you can chain multiple percent changes (like a discount followed by a tax) in a single line.

  • Type a percent directly as a decimal: 0.15*240 for '15% of 240'
  • Percent change in one line: (new - old)/old * 100
  • Chain multiple percent changes together: 500*1.08*0.95 for an 8% increase followed by a 5% decrease

Practice questions

Q1What is 35% of 180?
Easy
Q2A shirt's price increased from $40 to $52. What is the percent increas…
Easy
Q3A $250 item is first increased in price by 20% and then decreased by 1…
Medium
Q472 is what percent of 480?
Medium
Q5After a 25% discount, a jacket costs $63. What was the original price?
Hard