Calculate how many percent a value has increased or decreased, from a given starting value to an ending value.
If a number goes from 800 to 1000, the change is (1000 − 800) ÷ 800 × 100 = 25% — an increase of 25%. If the number gets smaller instead, the answer is negative, meaning a decrease.
It's easy to confuse percent change with a percentage-point change, but they don't mean the same thing. If an interest rate goes from 4% to 5%, that's a change of 1 percentage point — but measured as percent change it's an increase of 25% (because 1 ÷ 4 × 100 = 25). Percentage points show the raw difference between two percentage shares, while percent change shows how large the relative change is.
Percentage points are the raw difference between two percentage shares (e.g. from 4% to 5% is 1 percentage point), while percent change shows how large the relative change is compared to the starting value (1 ÷ 4 × 100 = 25% increase).
When the to-value is lower than the from-value, the difference (to − from) becomes negative. That gives a negative percentage, showing the value has gone down instead of up.
Yes. Set the old salary or price as the from-value, and the new salary or price as the to-value, and the calculator shows the percentage increase.