Percentage Increase Calculator
Find the percentage increase between two values instantly. Enter the original value and the new value, and this calculator will tell you exactly how much it has increased as a percentage, with clear step-by-step workings.
How It Works
Percentage increase measures how much a value has grown relative to its original amount. It is useful for comparing prices, salaries, populations, scores, and many other quantities over time.
The Formula
% Increase = ((New Value − Original Value) ÷ Original Value) × 100
You subtract the original from the new value, divide by the original, and multiply by 100 to express the result as a percentage. If the answer is positive, the value has increased. If it is negative, use the percentage decrease calculator instead.
When to Use This
Use this calculator when a value has gone up and you want to express the growth as a percentage. Common examples include pay rises, house price increases, investment returns, and score improvements.
Worked Examples
Example 1: Price rises from £200 to £250
((250 − 200) ÷ 200) × 100 = (50 ÷ 200) × 100 = 25%
Example 2: Salary increases from £28,000 to £31,500
((31500 − 28000) ÷ 28000) × 100 = (3500 ÷ 28000) × 100 = 12.5%
Example 3: Website traffic grows from 1,200 to 1,800 visitors
((1800 − 1200) ÷ 1200) × 100 = (600 ÷ 1200) × 100 = 50%
Example 4: Exam score improves from 55 to 72
((72 − 55) ÷ 55) × 100 = (17 ÷ 55) × 100 ≈ 30.91%
Example 5: Product revenue rises from £4,500 to £6,300
((6300 − 4500) ÷ 4500) × 100 = (1800 ÷ 4500) × 100 = 40%
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