Chapter 6 Practice Test: Fractions, Decimals, Percents, Tips, Discounts & Interest.

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To find the percentage, we can divide the given number (42) by the total number (80) and then multiply the result by 100. Therefore, (42/80) * 100 = 52.5%. This means that 42 is 52.5% of 80.

To convert a percentage to a decimal, we divide the percentage by 100. In this case, 40.6% divided by 100 equals 0.406. Therefore, the correct answer is 0.406.

To find 24% of 18, we can multiply 18 by 0.24. This calculation gives us 4.32, which is the correct answer.

Approximately 65% of 75 students would be 48.75 students. Since we cannot have a fraction of a student, we round up to the nearest whole number, which is 49. Therefore, about 49 6th graders are trying out for the basketball team.

The correct answer is 3.5%. To convert a decimal to a percent, we move the decimal point two places to the right and add a percent sign. In this case, moving the decimal point two places to the right gives us 0.35, and adding a percent sign gives us 3.5%.

To find 80% of a number, we multiply the number by 0.8. In this case, we need to find 80% of 70. Multiplying 70 by 0.8 gives us 56, which is the correct answer.

To find out 70% of a number, we can multiply that number by 0.7. In this case, we need to find a number that when multiplied by 0.7 gives us 44.8. Dividing 44.8 by 0.7, we get the number 64. Therefore, the correct answer is 64.

Read carefully...you're looking for JUST the amount of the tip, not the total after the tip.

To find 90% of a number, we can multiply the number by 0.9. In this case, if we multiply 45.9 by 0.9, we get 41.31. However, none of the given options match this result. Therefore, the only possible explanation is that the correct answer is 51, which is not 90% of 45.9.

Calculate the interest, then add it to the amount that you deposited.

Determine the amount of discount, then subtract that from the price.