Percent decrease is a measure of percent change, which is the extent to which something loses value.
How to Calculate Percentage Decrease
- Subtract starting value minus final value
- Divide that amount by the absolute value of the starting value
- Multiply by 100 to get percent decrease
- If the percentage is negative, it means there was an increase and not a decrease.
In other words
Start with working out the difference (decrease) between the two numbers you are comparing.
Decrease = Original Number – New Number
Next, divide the decrease by the original number and multiply the answer by 100.
% Decrease = Decrease ÷ Original Number × 100
Percentage Decrease Formula
You can use the percentage decrease formula for any percent decrease calculation:
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