Percentage decrease calculator
Percentage Decrease Calculator
Use this percentage decrease or percentage reduction calculator to compare an original value with a new value. It shows the percentage decrease, absolute drop, and formula.
Percentage decrease
20%
From 150 to 120 is a 20% decrease (30).
Absolute drop
30
Change status
Decrease
How it works
Measure the drop against the starting value
Percentage decrease measures how much of the original value was lost. The starting value is the baseline.
Percentage decrease formula
((original value - new value) ÷ original value) × 100
Find the absolute drop, divide it by the original value, then multiply by 100.
Worked example
- 1. Start with 150 and 120.
- 2. The absolute drop is 30.
- 3. 30 ÷ 150 = 0.2.
- 4. 0.2 × 100 = 20%.
When people use this
- Discounts: check how far a price fell.
- Budgets: measure a cut between periods.
- Inventory: compare lower stock levels.
- Traffic: measure a drop in visits.
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