Percent Proportion

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What is Percent Proportion?

Back

Percent proportion is a way to express a number as a fraction of 100. It is used to compare a part to a whole in terms of percentage.

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How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 60% of 145, calculate 145 x 0.60 = 87.

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What is the formula to find the whole when given a part and a percentage?

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The formula is: Whole = Part / (Percentage in decimal form). For example, if 150 is 15% of a number, the whole is 150 / 0.15 = 1000.

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How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

What is 25% of 28?

Back

25% of 28 is 7. (28 x 0.25 = 7)

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If 90% of a number is 108, what is the number?

Back

The number is 120. (108 / 0.90 = 120)

Front

What is the percentage of correct answers if a student answers 36 questions correctly out of 40?

Back

The percentage of correct answers is 90%. (36 / 40 x 100 = 90%)

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How do you find the percentage increase?

Back

To find the percentage increase, subtract the original number from the new number, divide by the original number, and multiply by 100. For example, if a price increases from $50 to $60, the increase is (60-50)/50 x 100 = 20%.

Front

What is the relationship between percentage, part, and whole?

Back

The relationship is expressed as: Percentage = (Part / Whole) x 100.

Front

How do you find the percentage decrease?

Back

To find the percentage decrease, subtract the new number from the original number, divide by the original number, and multiply by 100. For example, if a price decreases from $80 to $60, the decrease is (80-60)/80 x 100 = 25%.