Percentage Increase & Decrease Calculator
Find the new value after any percentage increase or decrease. Works for salary raises, price changes, inflation adjustments, discounts and any % change.
% increase / decrease
How to calculate a raise or price change
Formula: New value = Original × (1 + percentage/100). For an increase, enter a positive number. For a decrease, enter a negative number. Example: a 15% salary raise on $5,000 = $5,000 × 1.15 = $5,750. A 10% price cut on $200 = $200 × 0.90 = $180.
Frequently asked questions
Multiply your current salary by 1.10. Example: $4,500 × 1.10 = $4,950. Alternatively, find 10% of your salary ($450) and add it.
Inflation is the percentage rise in prices over time. If inflation is 5% and your salary increases by 3%, your real (purchasing power) salary has decreased by 2%.
Apply each discount sequentially, not cumulatively. A 20% discount then a 10% discount on £100: £100 × 0.80 = £80, then £80 × 0.90 = £72 — not 30% off.