20% of 90 is 18. To calculate this: 1) Convert 20% to decimal (20/100 = 0.2), 2) Multiply by 90 to get 18.

What is 20% of 90?

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Result

20% of 90 = 18

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

20% means 20 parts out of 100. To convert a percentage to a decimal, we divide by 100: 20% = 0.2

We multiply our number (90) by the decimal form of the percentage (0.2):
90 × 0.2 = 18

This means that 20% or 0.2 of 90 is 18. In other words, if you take 20% of 90, you get 18.

When a $90 product has a 20% discount, you save $18 and pay $72.

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

When 20% sales tax is added to a $90 purchase, $18 is added for tax, making the total $108.

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

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

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

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

If a hospital reduces infections by 20% from 90 cases monthly, they now have only 72 cases per month.

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