🔢 Percentage of a Number Calculator
Three essential percentage calculations: find X% of Y, what percent X is of Y, and more.
1. What is X% of Y?
2. What percent is X of Y?
3. X is what percent of Y?
Percentage of a Number Calculator
This tool covers the three most common percentage calculations you encounter in everyday life, academics, and business. Whether you need to calculate a discount, determine a tip, find a tax amount, or understand what proportion one number represents of another, this calculator has you covered.
Each section handles a specific type of percentage problem. The formulas are straightforward but easy to mix up, so having a dedicated tool for each ensures accuracy. All calculations update instantly as you type.
Frequently Asked Questions
How do I find a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 25% of 200 = (25 × 200) / 100 = 50. You can also convert the percentage to a decimal (25% = 0.25) and multiply: 0.25 × 200 = 50.
What percent is X of Y?
Divide X by Y and multiply by 100. For example, to find what percent 30 is of 150: (30 ÷ 150) × 100 = 20%. This tells you that 30 is 20% of 150.
X is what percent of Y?
This is the same calculation as "what percent is X of Y." Divide X by Y and multiply by 100. The result tells you the percentage that the first number represents relative to the second. If X = 75 and Y = 200, then 75 is 37.5% of 200.