7th Grade: Percent Review

Front

What is a percent?

Back

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

Front

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, 40% of 85 is 0.40 * 85 = 34.

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CCSS.6.RP.A.3C

Front

What does 'discount' mean?

Back

A discount is a reduction in the regular price of a product or service.

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CCSS.6.RP.A.3C

Front

If an item costs $100 and is on sale for 20% off, how much do you pay?

Back

You pay $80. (100 - (20% of 100) = 100 - 20 = 80)

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CCSS.6.RP.A.3C

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal × Rate × Time.

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CCSS.7.RP.A.3

Front

If you invest $500 at an interest rate of 5% for 5 years, how much interest do you earn?

Back

You earn $125. (500 × 0.05 × 5 = 125)

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CCSS.7.RP.A.3

Front

What is the original price if a $403.75 television is marked down by 5%?

Back

The original price is $425. (403.75 = 0.95 × Original Price, so Original Price = 403.75 / 0.95 = 425)

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CCSS.6.RP.A.3C

Front

What does it mean if 90 is 120% of a number?

Back

It means that 90 is greater than the number by 20%. To find the number, divide 90 by 1.2.

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CCSS.6.RP.A.3C

Front

How do you find the best deal among different sale prices?

Back

Calculate the final price after discounts for each option and compare them.

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CCSS.6.RP.A.3B

Front

If a jacket costs $85 and is 40% off, how much do you pay?

Back

You pay $51. (85 - (40% of 85) = 85 - 34 = 51)

Tags

CCSS.6.RP.A.3C