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🎓 Mathematics • Ratios & Percentages
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Percentage Calculator
Calculate what percentage one number is of another, percentage increases and decreases, discounts, and tips.
Studio-Grade Mathematical Suite
Math & Statistics Calculator
High-precision percentage, fraction arithmetic, ratio scaling, dataset averages, statistical variance, and combinatorics.
Quick Presets:
Calculated Result
37.5
Formula: 15% × 250 = 37.5
What is a Percentage?
A percentage is a proportion or fraction of 100, represented by the % symbol.
Percentages standardize comparisons across different scale sizes and totals.
Formula & Step-by-Step Calculation
P = (Part / Whole) × 100
Divide the part by the total whole and multiply by 100.
Worked Step-by-Step Examples
Example 1
What is 20% of 150?
Solution: 30
• 0.20 × 150 = 30
Common Real-World & Academic Use Cases
- ✓ Sales discounts
- ✓ Tax calculations
- ✓ Interest rate estimates
How to Use the Percentage Calculator
1
Select Mode
Choose percent of, change, or discount.
2
Enter Numbers
Input known values.
3
Read Result
View percentage and steps.
Frequently Asked Questions
Q: How do you convert a decimal to a percent?
Multiply the decimal number by 100 and add the % symbol.