How much did it change (in %)?

Enter the original and the new amount. We’ll compute percent change.

Result

Result: 20%

Because ((300 − 250) ÷ |250|) × 100

Find how much something increased or decreased in percentage terms. We also show the simple formula.

How do I calculate percent change?: Subtract the original from the new value, divide by the absolute original, then multiply by 100. Example: (125 − 100) ÷ 100 × 100 = 25%.
What does a negative result mean?: A negative percent means a decrease. Example: from 80 to 60 is −25%.
When is this useful?: Sales growth, weight loss, price changes, portfolio performance—any time something increases or decreases.
What's the difference between percentage change and percentage points?: Percentage change compares relative difference; percentage points measure absolute difference. From 10% to 20% is a 100% change but only 10 percentage points.
Can percentage change be more than 100%?: Yes! Going from 50 to 150 is a 200% increase. Any time the new value is more than double the original, you'll have over 100% change.
What if the original value is zero?: Percentage change is undefined when the original is zero, since you'd be dividing by zero. You can only express this as an absolute change (e.g., +50 units).
How do I calculate percentage decrease?: Use the same formula—a decrease will naturally give a negative result. Example: from 100 to 75 = ((75 − 100) ÷ 100) × 100 = −25%.

Using new value instead of original: Always divide by the original (old) value, not the new value. The denominator should be where you started from.
Forgetting the negative sign: Decreases should show negative percentages. From 100 to 80 is −20%, not +20%.
Confusing percent change with percentage points: These are different measurements. Growing from 20% to 30% is a 50% change, or 10 percentage points.
Mixing up which value is which: "Change from A to B" means A is original, B is new. The formula is always (New − Original) ÷ Original × 100.

Your company's monthly revenue grew from $50,000 to $65,000.

Calculation: ((65000 − 50000) ÷ 50000) × 100 = 30%

Result: 30% revenue growth month-over-month

You started at 200 pounds and now weigh 180 pounds.

Calculation: ((180 − 200) ÷ 200) × 100 = −10%

Result: You lost 10% of your original body weight

You bought a stock at $40 per share. It's now trading at $52 per share.

Calculation: ((52 − 40) ÷ 40) × 100 = 30%

Result: Your investment gained 30%