Percentage
Percent of, percent change, and share
Worked example
Using the default values, percentage gives a first as a percentage of second of 25.0%.
| Item | Value |
|---|---|
| First is what % of second | 25.0% |
| First % of second | 2,500 |
| Change from first to second | +300.0% |
| Difference | 750 |
| Second increased by first% | 3,500 |
| Second reduced by first% | -1,500 |
What you need
- First number
- Second number
Questions
How do I work out a percentage increase?
Subtract the old value from the new, divide by the old, and multiply by 100. Going from 250 to 1,000 is a 300% increase, not 400% — a common slip.
Why is a 50% fall not undone by a 50% rise?
Because the rise applies to the smaller number. ₹100 falling 50% leaves ₹50; a 50% rise on that returns ₹75. You need a 100% gain to recover a 50% loss.