パーセント減少計算機
Calculate how much a value dropped in percent. Enter the original and the new value and the calculator shows the percentage decrease plus the absolute amount lost.
計算例
200 → 150: ((200 − 150) ÷ 200) × 100 = 25%
計算方法
- Enter the original value — the larger, starting number.
- Enter the new value — the smaller, final number.
- Read the percentage decrease and the absolute amount lost.
計算式
Percentage Decrease = ((Original − New) ÷ Original) × 100
解説
- Price drops, discounts measured over time, weight or cost reduction.
- Comparing before/after metrics in reports.
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よくある質問
How do I calculate percentage decrease?
Subtract the new value from the original value, divide by the original value, and multiply by 100. Example: from 200 to 150 → (50 ÷ 200) × 100 = 25%.
Why is my result negative?
A negative result means the value actually increased. Swap your inputs or use the percentage increase calculator.