The Complete Guide to Calculating Percentages
Percentages are everywhere—from shopping discounts and bank interest rates to student grades and tax calculations. Yet, finding the right formula can be confusing. Our All-in-One Percentage Calculator handles every possible scenario for you.
1. How to Calculate Percentage of a Number
This is the most common calculation. For example, "What is 20% of 500?".
Example: 20 ÷ 100 = 0.2. Then 0.2 × 500 = 100.
2. Percentage Change (Increase / Decrease)
Used to track growth or loss. For example, if a stock price goes from $50 to $60, what is the percentage increase?
Example: ($60 - $50) ÷ $50 = 0.2. Then 0.2 × 100 = 20% Increase.
3. How to Calculate Discounts
When shopping, you see "30% Off". How do you know the final price?
Final Price = Original Price - Discount Amount
Example: Shirt costs $50 with 20% off.
Discount: 50 × 0.20 = $10.
Final Price: 50 - 10 = $40.
Common Percentage FAQs
What is 1% of any number?
Simply divide the number by 100. For example, 1% of 500 is 5.
How to convert a fraction to percentage?
Divide the numerator (top number) by the denominator (bottom number) and multiply by 100. Example: 1/4 = 0.25 = 25%.