Calculate various types of percentages quickly and easily
Calculate what percentage one number is of another number.
25 is 25% of 100
To find what percentage X is of Y:
(X ÷ Y) × 100 = Percentage
(25 ÷ 100) × 100 = 25%
Calculate the percentage increase from an original value to a new value.
The increase from 100 to 120 is 20%
To find the percentage increase from X to Y:
((Y - X) ÷ X) × 100 = Percentage Increase
((120 - 100) ÷ 100) × 100 = 20%
Calculate the percentage decrease from an original value to a new value.
The decrease from 100 to 80 is 20%
To find the percentage decrease from X to Y:
((X - Y) ÷ X) × 100 = Percentage Decrease
((100 - 80) ÷ 100) × 100 = 20%
Calculate the percentage difference between two values.
The percentage difference between 80 and 100 is 25%
To find the percentage difference between X and Y:
(|X - Y| ÷ ((X + Y) ÷ 2)) × 100 = Percentage Difference
(|80 - 100| ÷ ((80 + 100) ÷ 2)) × 100 = 25%
To calculate 8% sales tax on $50:
$50 × 0.08 = $4
Total: $50 + $4 = $54
To calculate a 25% discount on $80:
$80 × 0.25 = $20
Sale price: $80 - $20 = $60
To calculate a 15% tip on $45:
$45 × 0.15 = $6.75
Total with tip: $45 + $6.75 = $51.75
To calculate a test score of 42 out of 50:
(42 ÷ 50) × 100 = 84%
Percentages are a way of expressing numbers as fractions of 100. They are used in everyday life for various calculations, from discounts and taxes to statistics and data analysis.