90% of 20 is 18. To calculate this: 1) Convert 90% to decimal (90/100 = 0.9), 2) Multiply by 20 to get 18.

What is 90% of 20?

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Result

90% of 20 = 18

90\% \times 20 = 20 \times \frac{90}{100} = 18

90% means 90 parts out of 100. To convert a percentage to a decimal, we divide by 100: 90% = 0.9

We multiply our number (20) by the decimal form of the percentage (0.9):
20 × 0.9 = 18

This means that 90% or 0.9 of 20 is 18. In other words, if you take 90% of 20, you get 18.

When a $20 product has a 90% discount, you save $18 and pay $2.

If you want to leave a 90% tip on a $20 meal, you would leave $18 as the tip.

When 90% sales tax is added to a $20 purchase, $18 is added for tax, making the total $38.

If 90% of students in a class are boys and there are 20 students total, that means there are 18 boys.

If you invest $20 and earn 90% annual interest, you'll receive $18 in interest for the year.

If a student answers 90% of questions correctly on a 20-question test, they answered 18 questions correctly.

If 90% of your monthly revenue goes to operating expenses and you earn $20, you spend $18 on operations.

If a hospital reduces infections by 90% from 20 cases monthly, they now have only 2 cases per month.

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