Use this calculator to find out what percentage one number is of another. This is useful for calculating grades, discounts, progress, and more.
Understanding Percentages
A percentage is a way of expressing a number as a fraction of 100. It's often denoted using the percent sign (%). For example, 50% means 50 out of 100, or 50/100.
How to Calculate "X is What Percentage of Y?"
The fundamental formula for finding what percentage one number (X) is of another number (Y) is:
Percentage = (X / Y) * 100
Let's break down the components:
X (Part Value): This is the specific amount or quantity you want to express as a percentage.
Y (Total Value): This is the whole, the total, or the reference amount against which X is being compared.
100: We multiply by 100 to convert the decimal fraction into a percentage.
Practical Examples
This calculation is incredibly versatile and used in many everyday situations:
Grades: If you scored 85 out of a possible 100 on a test, your percentage grade is (85 / 100) * 100 = 85%.
Discounts: If an item originally costs $50 and is discounted by $10, the discount percentage is ($10 / $50) * 100 = 20%.
Progress: If you've completed 30 tasks out of a total of 120 tasks, your completion percentage is (30 / 120) * 100 = 25%.
Statistics: If 15 out of 60 people surveyed prefer a certain product, the percentage of people who prefer it is (15 / 60) * 100 = 25%.
How to Use This Calculator
Enter the "Value to be expressed as a percentage (X)": This is the specific part or amount you are interested in.
Enter the "Total or reference value (Y)": This is the whole amount that X is a part of.
Click "Calculate Percentage": The calculator will then display the result, showing what percentage X is of Y.
Ensure that your "Total or reference value" is not zero, as division by zero is undefined.