15% of 30 is 4.5. To calculate this: 1) Convert 15% to decimal (15/100 = 0.15), 2) Multiply by 30 to get 4.5.

What is 15% of 30?

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Result

4.5

15% of 30 = 4.5

15\% \times 30 = 30 \times \frac{15}{100} = 4.5

15% means 15 parts out of 100. To convert a percentage to a decimal, we divide by 100: 15% = 0.15

We multiply our number (30) by the decimal form of the percentage (0.15):
30 × 0.15 = 4.5

This means that 15% or 0.15 of 30 is 4.5. In other words, if you take 15% of 30, you get 4.5.

When a $30 product has a 15% discount, you save $4.5 and pay $25.5.

If you want to leave a 15% tip on a $30 meal, you would leave $4.5 as the tip.

When 15% sales tax is added to a $30 purchase, $4.5 is added for tax, making the total $34.5.

If 15% of students in a class are boys and there are 30 students total, that means there are 5 boys.

If you invest $30 and earn 15% annual interest, you'll receive $4.5 in interest for the year.

If a student answers 15% of questions correctly on a 30-question test, they answered 5 questions correctly.

If 15% of your monthly revenue goes to operating expenses and you earn $30, you spend $4.5 on operations.

If a hospital reduces infections by 15% from 30 cases monthly, they now have only 26 cases per month.

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