How to Find a Percentage of a Number & Percentage Calculator

Finding a percentage of a number is one of the most essential skills in math—used in everything from budgeting and cooking to business and data analysis. Whether you're calculating discounts, commissions, or proportions, understanding this concept will save you time and help you make smarter decisions.

Percentage Calculator

You can use the percentage calculator below to find Percentage of a Number that calculates a specific percentage of a given value.

Percentage (%)

Of Value

Examples:

20% of 150 = 30
5% of 1200 = 60

Tips:

Useful for tips, discounts

What Does "Percentage of a Number" Mean?

A percentage represents a part per hundred. So, when you're finding a percentage of a number, you're identifying how much that percentage represents out of the total.

The Formula: How to Calculate a Percentage of a Number

Percentage of a number = (Percentage / 100) × Whole Number

Example: What is 25% of 200?

= (25 / 100) × 200 = 0.25 × 200 = 50

Real-Life Applications

Shopping: 30% off a $60 item? That's $18 off.
Nutrition: 15% protein in a 100g bar? That's 15g of protein.
Finance: 10% interest on $1,000? That's $100 earned.

Quick Tip: You can use decimals directly:
- 10% = 0.10
- 20% = 0.20
- 75% = 0.75

So to find 75% of 80:

0.75 × 80 = 60

Online Percentage Tools

While mental math is great, online calculators can make things quicker.
You can use our good percentage calculator.

Practice Questions

What is 40% of 500?
What is 15% of 120?
What is 70% of 80?

Answers:

40% of 500 = 200
15% of 120 = 18
70% of 80 = 56

Summary

Finding a percentage of a number is easy once you know the formula. Whether you're a student, shopper, or entrepreneur, this skill will come in handy. Just remember:

Percentage of a number = (Percentage / 100) × Total

Bookmark this guide, or better yet—practice a few examples and make it second nature!