Percentage Change Calculator

Find the percentage increase or decrease between an original value and a new value.

Percentage change

Original value

New value

Enter the original value and the new value. A positive result is a percentage increase; a negative result is a percentage decrease.

Change % = ((new − original) ÷ original) × 100

Example: 50 → 65 is (15 ÷ 50) × 100 = 30% increase.

Example: 80 → 60 is (−20 ÷ 80) × 100 = −25% (a 25% decrease).

How do I calculate percentage increase?

Subtract the original from the new value, divide by the original, and multiply by 100.

Can the result be negative?

Yes — a negative result means a percentage decrease.

What is a 50% increase of 100?

150 — the increase is 50% of 100 = 50.