How to Calculate Percentage Easily

Percentages are everywhere: shopping discounts, exam scores, taxes, and interest rates. The word 'percent' simply means 'per hundred'.

The Basic Rule

To find a percentage of a number, you multiply the number by the percentage fraction. For example, to find 20% of 150: 150 * (20 / 100) = 30

Quick Mental Math Tips

• 10%: Move the decimal point one place to the left (10% of 450 is 45).
• 5%: Find 10% and halve it (5% of 450 is 22.5).
• 1%: Move the decimal point two places to the left.

If mental math isn't your thing, save time by using our Percentage Calculator.