Percentage Change Calculator
Percentage change calculator: compare two numbers to get the percent increase or decrease and the raw difference, with the formula and steps shown.
Formula
change = (new − old) / |old| × 100
Use it from the API
curl "https://moltcalc.com/api/calc/percentage-change?from=120&to=150"
See the API docs for every endpoint and the input schema.
FAQ
How do I calculate percent change?+
Subtract the original value from the new value, divide by the original value, and multiply by 100. Going from 120 to 150 is (150 minus 120) / 120 × 100 = 25% increase.
Can a percentage increase be more than 100%?+
Yes. Doubling is a 100% increase, tripling is 200%, and so on. A decrease, on the other hand, can never go below 100%, because losing 100% means reaching zero.
Why can't the original value be zero?+
Percent change divides by the original value, and division by zero is undefined. Any change from zero would be an infinite percentage.
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