Find the percentage increase or decrease from an old value to a new value. Nothing leaves your browser.
Percent change = (new − old) ÷ |old| × 100. A positive result is an increase, a negative result is a decrease.
Subtract the old value from the new value, divide by the old value, then multiply by 100. From 80 to 100: (100 − 80) ÷ 80 × 100 = 25% increase.
No. Percent change compares to a starting value, so direction matters. Percent difference compares two values symmetrically.
Dividing by zero is undefined, so percent change from 0 cannot be calculated.
The result is negative and shown as a percentage decrease. From 100 to 80 is a 20% decrease.
No. Everything is calculated in your browser and nothing is sent or stored.
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