10% of 40 is 4. To calculate this: 1) Convert 10% to decimal (10/100 = 0.1), 2) Multiply by 40 to get 4.

What is 10% of 40?

Use our percentage calculator to easily find what 10 percent of 40 is. Calculate percentages fast with this simple percent calculator tool.

Result

10% of 40 = 4

10\% \times 40 = 40 \times \frac{10}{100} = 4

10% means 10 parts out of 100. To convert a percentage to a decimal, we divide by 100: 10% = 0.1

We multiply our number (40) by the decimal form of the percentage (0.1):
40 × 0.1 = 4

This means that 10% or 0.1 of 40 is 4. In other words, if you take 10% of 40, you get 4.

When a $40 product has a 10% discount, you save $4 and pay $36.

If you want to leave a 10% tip on a $40 meal, you would leave $4 as the tip.

When 10% sales tax is added to a $40 purchase, $4 is added for tax, making the total $44.

If 10% of students in a class are boys and there are 40 students total, that means there are 4 boys.

If you invest $40 and earn 10% annual interest, you'll receive $4 in interest for the year.

If a student answers 10% of questions correctly on a 40-question test, they answered 4 questions correctly.

If 10% of your monthly revenue goes to operating expenses and you earn $40, you spend $4 on operations.

If a hospital reduces infections by 10% from 40 cases monthly, they now have only 36 cases per month.

Percentage (%)

Number