Percentage Decrease Calculator
Calculate a value after a percentage decrease and see the exact reduction.
What this calculator does
Enter an original value and percentage to calculate the decreased value, reduction amount, and formula.
Inputs and what they mean
- Original value
- — number value.
- Percentage
- — number value.
How to use it
- Enter the original value.
- Enter a decrease from 0% to 100%.
- Read the reduced value and decrease amount.
Formula
Decreased value = original value × (1 − percentage ÷ 100).
Worked example
Decrease 200 by 15%
The decrease is 30, so the new value is 170.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
Results depend entirely on the figures you enter and are rounded for display. They are for general information and education, not professional advice.
Common questions
Related tools
Calculate percentages, proportions, and percentage change with a clear formula breakdown.
Calculate a value after a percentage increase and see the exact increase amount.