A percentage increase calculator tells you how much something grew relative to its original value, expressed as a percentage. Whether you are tracking sales growth, calculating a salary raise, analyzing stock performance, or understanding inflation, the percentage increase formula gives you a clear, comparable number.
Percentage Increase Formula
Percentage Increase = ((New Value – Old Value) / Old Value) x 100
This formula tells you by what percentage the new value is larger than the old value.
Percentage Increase Examples
| Scenario | Old Value | New Value | Calculation | Result |
|---|---|---|---|---|
| Salary raise | $50,000 | $55,000 | ((55000-50000)/50000) x 100 | 10% increase |
| Product price | $80 | $100 | ((100-80)/80) x 100 | 25% increase |
| Website traffic | 1,200 | 1,500 | ((1500-1200)/1200) x 100 | 25% increase |
| Weight gain | 70 kg | 75 kg | ((75-70)/70) x 100 | 7.1% increase |
Percentage Decrease Formula
Percentage Decrease = ((Old Value – New Value) / Old Value) x 100
Example: A price dropped from $200 to $150. Percentage decrease = ((200-150)/200) x 100 = 25% decrease.
How to Calculate Percentage Change (Both Directions)
The general percentage change formula works for both increases and decreases: Percentage Change = ((New – Old) / Old) x 100. A positive result means an increase; a negative result means a decrease. Use the free ReadyGoTools Percentage Calculator to calculate any percentage change instantly.
Common Percentage Increase Questions Answered
What is a 10% increase of 200? 200 x 1.10 = 220. Or: 200 + (200 x 0.10) = 200 + 20 = 220.
What is a 25% increase of 80? 80 x 1.25 = 100. Or: 80 + (80 x 0.25) = 80 + 20 = 100.
What is a 50% increase of 60? 60 x 1.50 = 90. Or: 60 + (60 x 0.50) = 60 + 30 = 90.
What is a 100% increase of any number? Double it. A 100% increase means the value doubled.
What is a 5% increase of 1,000? 1000 x 1.05 = 1,050.
How to Find Original Value After a Percentage Increase
If you know the final value and the percentage increase, reverse-calculate the original: Original = Final / (1 + Percentage/100)
Example: After a 20% increase, a price is $120. What was the original?
$120 / (1 + 20/100) = $120 / 1.20 = $100.
Percentage Increase vs Percentage Points
Percentage increase and percentage points are different. If an interest rate goes from 5% to 6%, that is a 1 percentage point increase, but it is a 20% increase in the rate itself ((6-5)/5 x 100 = 20%). Be precise when communicating financial or statistical changes.
Frequently Asked Questions
How do I calculate percentage increase between two numbers?
Subtract the old number from the new, divide by the old number, and multiply by 100. Use the Percentage Calculator for instant results.
What is 15% increase of 200?
200 x 1.15 = 230. The 15% increase adds 30 to 200.
How do you calculate a 20% increase?
Multiply the original number by 1.20. Example: 20% increase of 150 = 150 x 1.20 = 180.
Related Calculators
- Percentage Calculator — all percentage calculations in one tool
- How to Calculate Percentage — Complete Guide with Formulas
- Age Calculator — calculate age from date of birth