Percent of a Number

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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How do you find a percent of a number?

Back

To find a percent of a number, multiply the number by the percent (in decimal form). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

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What does it mean to find 'X is Y% of Z'?

Back

It means to find the number Z such that Y% of Z equals X. This can be calculated using the formula Z = X / (Y/100).

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What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 80 is 40.

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What is 25% of a number?

Back

25% of a number is one quarter of that number. For example, 25% of 80 is 20.

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How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 75% as a decimal is 0.75.

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What is 10% of 100?

Back

10% of 100 is 10.

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What is 80% of 80?

Back

80% of 80 is 64.

Front

What is 28% of 4?

Back

28% of 4 is 1.12.

Front

How do you calculate the percent of a number using a proportion?

Back

Set up a proportion where the part is to the whole as the percent is to 100. For example, if you want to find 30% of 50, set it up as x/50 = 30/100.