Percentage Decrease Calculator
Find the percentage decrease from a starting value to a new, lower value. Everything runs locally in your browser.
How it works
Subtract the new value from the original, divide by the original, and multiply by 100: ((old − new) ÷ old) × 100. For all three percentage modes, use the full Percentage Calculator.
Where you'd use this
Discounts, price drops, budget cuts and any “down from” figure. As with increases, the base is the starting value, so the same absolute change gives a different percentage depending on which direction you travel.
For example: A laptop reduced from $1,200 to $900 is a 25% decrease. Going back the other way, $900 to $1,200 is a 33.3% increase — the same $300, two different percentages, because the base changed.
FAQ
How do I calculate percentage decrease?
((old − new) ÷ old) × 100. From 200 to 150 is ((200 − 150) ÷ 200) × 100 = 25%.
Is my data uploaded?
No — it runs entirely in your browser.