逆パーセント計算機
Work backwards from a known percentage: if you know a result and the percentage it represents, the calculator finds the original whole. Perfect for reverse-engineering discounts, taxes and commissions.
計算例
75 is 15% of: 75 × 100 ÷ 15 = 500
計算方法
- Enter the result — the part you already know.
- Enter the percentage it represents.
- Read the original whole number.
計算式
Original = Result × 100 ÷ Percent
解説
- Finding the pre-tax price when only the total is known.
- Working out the original price before a discount.
関連する計算機
よくある質問
60 is 30% of what number?
60 × 100 ÷ 30 = 200. Enter the part and the percentage above to solve any similar problem.
How is this different from a percentage-off calculator?
A percentage-off calculator works forward from the original price; a reverse percentage calculator works backwards from a known part to the original whole.