Percentage Change Calculator

Subtract the original value from the new value, divide by the absolute value of the original, then multiply by 100. From 50 to 75 is (75 minus 50) divided by 50, times 100, which is 50 percent.

A negative percentage means the value went down. Going from 100 to 80 is a 20 percent decrease, shown as -20%. A positive result means the value went up.

Percentage change divides by the original value, and dividing by zero is undefined, so a starting value of 0 has no meaningful percent change. The calculator shows a short message instead of a number.

Percent change compares a From value with a To value. X is what % of Y divides a part by a whole, so 25 of 200 is 12.5 percent. P% of N takes a percentage of a number, so 15 percent of 200 is 30.

It divides by the absolute value of the original number. Going from -40 to -50 is a 25 percent change, reported as -25%, because the size grew while the sign stayed negative.

No. A move from 10 percent to 15 percent is 5 percentage points, but it is a 50 percent change relative to the starting 10. Use percentage points when comparing two percentages directly and percent change when measuring growth.

Reversing is not symmetric. A 50 percent increase from 100 gives 150, but returning from 150 to 100 is a 33.33 percent decrease, not 50, because the base changed. Use Percent change with the values swapped to see the exact figure.

Values are shown to up to six decimal places with trailing zeros removed, so a clean result like 50 stays 50 while a repeating one like going from 3 to 7 shows as 133.333333%.

Yes. All calculations run locally in your browser and nothing is uploaded to a server.