40% of 100 is 40. To calculate this: 1) Convert 40% to decimal (40/100 = 0.4), 2) Multiply by 100 to get 40.

What is 40% of 100?

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Result

40% of 100 = 40

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

40% means 40 parts out of 100. To convert a percentage to a decimal, we divide by 100: 40% = 0.4

We multiply our number (100) by the decimal form of the percentage (0.4):
100 × 0.4 = 40

This means that 40% or 0.4 of 100 is 40. In other words, if you take 40% of 100, you get 40.

When a $100 product has a 40% discount, you save $40 and pay $60.

If you want to leave a 40% tip on a $100 meal, you would leave $40 as the tip.

When 40% sales tax is added to a $100 purchase, $40 is added for tax, making the total $140.

If 40% of students in a class are boys and there are 100 students total, that means there are 40 boys.

If you invest $100 and earn 40% annual interest, you'll receive $40 in interest for the year.

If a student answers 40% of questions correctly on a 100-question test, they answered 40 questions correctly.

If 40% of your monthly revenue goes to operating expenses and you earn $100, you spend $40 on operations.

If a hospital reduces infections by 40% from 100 cases monthly, they now have only 60 cases per month.

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