Percentages Quiz
15 questions · free · new questions every attempt · Updated September 26, 2026
Percentages are used for prices, grades, interest and statistics, which makes them one of the most practical parts of school math. This quiz covers the everyday cases: taking a percent of a number, finding what percent one number is of another, working out a sale price and measuring a percent change.
What this quiz covers
- Finding a percent of a number
- Finding what percent one number is of another
- Calculating a sale price after a discount
- Percent increase and decrease
- Converting decimals to percents
- Estimating answers with 10% and 50% benchmarks
How to prepare
Anchor on easy percentages: 10% is one tenth, 50% is half, 25% is a quarter. Build others from those (15% is 10% plus half of 10%). For percent change always divide by the starting value. Our percentage guide shows the shortcuts.
Sample questions with answers
These five questions show the style. Your quiz above will have different numbers each time.
- What is 30% of 240?
Show answer
72. 30% = 30/100, so 240 × 0.3 = 72.
- 30 is what percent of 40?
Show answer
75%. 30 ÷ 40 = 0.75, which is 75%.
- A jacket costs $40. It is 20% off. What is the sale price?
Show answer
$32. Discount = 20% × 40 = $8. Sale price = 40 − 8 = $32.
- A value changes from 20 to 16. What is the percent decrease?
Show answer
20%. Change ÷ original × 100 = 4 ÷ 20 × 100 = 20%.
- Write 0.35 as a percent.
Show answer
35%. Multiply by 100: 0.35 × 100 = 35%.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percent by 100 and multiply. 25% of 80 is 0.25 × 80 = 20.
How do I calculate a discount?
Multiply the price by the discount rate to get the amount off, then subtract it. Or multiply by (1 − rate) in one step.
Is there a tool that shows the steps?
Yes, the percentage calculator shows the working.
Keep practising
How to Calculate Percentages7 min readPercentage CalculatorFind a percent of a number, percent change, and increases or decreases.
Multiplication Quiz15 questionsFractions Quiz15 questionsDecimals Quiz15 questionsReviewed September 26, 2026 by the SolveCalcPro editorial team. Questions are generated from tested formulas. Spot a mistake? Tell us.