Percentage Calculator ✨
Need a quick percent?
Drop in your numbers and our calculator fires back in a blink—ideal for sale prices, tips, or checking how much something grew (or shrank).
Percentage of Number
Calculates what a given percentage of a number is.
- Formula:
- (Percentage ÷ 100) × Number = Result
- Example:
- (10 ÷ 100) × 200 = 20
What is X% of Y?
Part as Percent of Whole
Calculates what percent one number is of another.
- Formula:
- (Part ÷ Whole) × 100 = X%
- Example:
- (20 ÷ 250) × 100 = 8%
X is what percentage of Y?
Percentage Change (Increase/Decrease)
Calculates the percentage increase or decrease between two values (“from” and “to”).
- Formula:
- ((New Value − Old Value) ÷ Old Value) × 100 = X%
- Example:
- ((65 − 50) ÷ 50) × 100 = 30%
What is the percentage increase/decrease fromX to Y?
Frequently Asked Questions
What’s a percentage?
A percentage is simply a slice of 100—think “25 % of cars are white.” Fun fact: the % sign evolved from the Italian “per cento” scribble back in the 1400s.
How do you calculate one?
Take the part, divide by the whole, then × 100. Example: 20 red apples ÷ 50 total = 0.4 → 40 %.
Why do percentages matter?
From discount tags and tax rates to stock charts and GDP swings, percentages turn raw numbers into instantly comparable insights—your secret weapon for smarter everyday decisions.
Genius is two percent inspiration and ninety-eight percent perspiration.