Understand the idea
Percent means per hundred. Multiply a quantity by the percentage divided by 100. You can also use familiar fractions: 50% is one half and 25% is one quarter.
See a worked example
25% of 80 = 80 × 25/100 = 20.
A useful check
A percentage needs a base quantity. Twenty percent of 50 differs from twenty percent of 200.
Try a fresh practice set
Five questions with feedback on every answer. New sets can repeat familiar ideas so you can practise again. This is practice, not a certified assessment.
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