Example
A laptop's price drops from $899 to $799. What is the percentage change?
(799 - 899) / 899 × 100 = -100 / 899 × 100 = -11.12
The price dropped by 11.12%.
Example
A streaming subscription increases from $9.99 to $12.99 a month. What is the percentage change?
(12.99 - 9.99) / 9.99 × 100 = 30.03
The price increased by about 30%.
Example
Two sellers quote different prices for the same used car: $14,500 and $13,200. What is the percentage difference between the quotes?
Since neither quote is a "before" or "after" value, this is better calculated with the percentage difference calculator, not this one — it would give: |14500-13200| / ((14500+13200)/2) × 100 = 9.39%.
When to use this calculator
Use this when there's a clear old price and new price — a price change over time, a sale, or a renewal. When you're comparing two prices from different sources with no time relationship between them, use the percentage difference calculator instead.
Frequently asked questions
Does this work for percentage discounts too?
Yes — a lower new price will simply return a negative percentage, showing the discount.
Can I use this for currencies other than dollars?
Yes, the calculation is currency-independent; just enter both prices in the same currency.
What if I only know the discount percentage and the sale price?
Use the reverse percentage change calculator to work out the original price. Related: percentage difference calculator and percentage change calculator.