Percentage Calculator
Fast, multi-mode calculator for percentage values, percentage changes, discounts, and ratio conversions.
Calculation 1Portion of Value
What is X% of Y?
Answer:
90
(18 ÷ 100) × 500 = 90
Calculation 2Ratio to Percent
X is what percent of Y?
Answer:
25%
(45 ÷ 180) × 100 = 25%
Calculation 3Percentage Change
Percentage Change (Increase/Decrease)
Change:
+35%
(Increase of 35)((135 - 100) ÷ |100|) × 100 = 35%
Calculation 4Shopping & Tax
Discount & Final Price
Final Price:
1200
You Save:
300
Percentage Formulas Reference
Percentage of a Number
P = (Percentage ÷ 100) × Total
To find 20% of 80, divide 20 by 100 (0.20) and multiply by 80 = 16.
Percentage Increase / Decrease
% Change = ((New - Old) ÷ Old) × 100
Subtract old value from new value, divide by old value, and multiply by 100.
Fraction to Percentage
% = (Numerator ÷ Denominator) × 100
Used for exam scores, survey results, and statistical sample measurements.