パーセント計算機
This all-in-one percentage calculator covers the three most common percentage questions: finding a percentage of a number, finding what percent one number is of another, and the percentage change between two numbers. Results update as you type.
計算例
15% of 500: (15 ÷ 100) × 500 = 75
計算方法
- Pick the question you need: X% of Y, X is what % of Y, or % change.
- Enter your numbers — the result updates instantly as you type.
- Check the calculation breakdown below the result to verify the math.
計算式
Part = (Percent ÷ 100) × Whole
解説
- Shopping: sales tax, tips, discounts and quick price comparisons.
- Work and study: marks, statistics, growth rates and reporting.
関連する計算機
よくある質問
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply by the number. For example, 15% of 500 is (15 ÷ 100) × 500 = 75. The calculator does this instantly and shows the steps.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 20 of 50 apples is (20 ÷ 50) × 100 = 40%.
What is the fastest way to calculate 10% of any number?
Move the decimal point one place to the left: 10% of 245 is 24.5. From there you can build other percentages — 5% is half of that, 20% is double.