80% of 90 is 72. To calculate this: 1) Convert 80% to decimal (80/100 = 0.8), 2) Multiply by 90 to get 72.

What is 80% of 90?

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Result

80% of 90 = 72

80\% \times 90 = 90 \times \frac{80}{100} = 72

80% means 80 parts out of 100. To convert a percentage to a decimal, we divide by 100: 80% = 0.8

We multiply our number (90) by the decimal form of the percentage (0.8):
90 × 0.8 = 72

This means that 80% or 0.8 of 90 is 72. In other words, if you take 80% of 90, you get 72.

When a $90 product has a 80% discount, you save $72 and pay $18.

If you want to leave a 80% tip on a $90 meal, you would leave $72 as the tip.

When 80% sales tax is added to a $90 purchase, $72 is added for tax, making the total $162.

If 80% of students in a class are boys and there are 90 students total, that means there are 72 boys.

If you invest $90 and earn 80% annual interest, you'll receive $72 in interest for the year.

If a student answers 80% of questions correctly on a 90-question test, they answered 72 questions correctly.

If 80% of your monthly revenue goes to operating expenses and you earn $90, you spend $72 on operations.

If a hospital reduces infections by 80% from 90 cases monthly, they now have only 18 cases per month.

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