Master Percent of a Number
Find any percent of any number with confidence. Learn to convert percents to decimals and multiply. Practice with our interactive tool and get instant feedback.
What is "X% of Y"?
Finding a fraction of a whole
When we ask "What is X% of Y?", we want to find X hundredths of Y. A percent is a fraction with denominator 100. Convert the percent to a decimal by dividing by 100, then multiply by the base number.
Percent to Decimal
Divide the percent by 100. 20% becomes 0.2, 33% becomes 0.33, 7.5% becomes 0.075.
Practice Percent Of →Percent Of Rules
Key steps for finding X% of Y
Convert Percent to Decimal
Divide by 100. 20% → 0.2, 25% → 0.25, 50% → 0.5.
Multiply by the Base
Once converted, multiply the decimal by the base number. Round decimals as needed.
Percent Of Examples
Worked examples
Basic Examples
Why Percent Of Matters
Finding a percent of a number appears in discounts, tips, tax, interest, and statistics. It is one of the most common real-world applications of arithmetic.
Applications
Used in shopping (20% off), tips (15% of bill), tax (8% of purchase), interest, and any situation where you need a fraction of a quantity.
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