Calculate percentage increase or decrease between two values, find a new value after a percentage change, or reverse-calculate the original value.
The standard formula for percentage change is:
% Change = ((New Value − Original Value) ÷ |Original Value|) × 100
| Example | Calculation | Result |
|---|---|---|
| Price rises from $80 to $100 | ((100−80)/80)×100 | +25% |
| Temperature falls from 40 to 32 | ((32−40)/40)×100 | −20% |
| Sales increase from 1,200 to 1,500 | ((1500−1200)/1200)×100 | +25% |