Percentage ratio calculator
What Percentage Is X of Y?
Enter a part and a whole to find what percentage the first number represents of the second. The result updates instantly and shows the ratio behind the percentage.
X is what percent of Y?
15%
36 is 15% of 240.
Decimal ratio
0.15
Formula
(X ÷ Y) × 100
Related calculators
Continue through the core percentage tools
Use the main calculator when the percentage is known, or compare values with the change and difference calculators.
Core calculation
Percentage Calculator
Find a known percentage of a number.
General comparison
Percentage Change Calculator
Measure movement from an original value to a new value.
Symmetric comparison
Percentage Difference Calculator
Compare two values without choosing a baseline.
Grade use case
Grade Percentage Calculator
Convert earned points into a percentage score and letter-grade estimate.