20% of 45 is 9. To calculate 20% of 45, multiply 45 by 0.2. The formula is: 45 × 0.2 = 9.

What is 20% of 45?

Answer

45 × 0.2 = 9

How to calculate 20% of 45

Convert the percentage to a decimal: 20% = 0.2

Multiply by the number: 45 × 0.2 = 9

So 20% of 45 = 9.

This means if you have 45 of something, 20% of it equals 9. The formula is always: Result = Number × (Percentage ÷ 100).

Need to calculate a different percentage? Use our free percentage calculator — supports percentage of a number, percent change, and tip calculations.

Simple & compound interest with charts

Monthly payments & amortization

Hourly rate, tax & take-home

Words, reading time & keyword density