Rates, Ratios, Percents, and Simple Interest

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities, often expressed as a quantity per unit of another quantity, such as miles per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100, often used to compare relative sizes.

Front

How do you calculate simple interest?

Back

Simple interest can be calculated using the formula: Interest = Principal × Rate × Time.

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CCSS.7.RP.A.3

Front

If Annika invests $2,500 at an annual rate of 5%, how much will she have in the account after 1 year?

Back

$2625

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CCSS.7.RP.A.3

Front

What is the unit rate of Alan baking 66 cupcakes in 3 hours?

Back

22 cupcakes per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate the new price after applying a discount?

Back

Subtract the discount amount from the original price. For example, a 25% discount on a $60 item is $15, making the new price $45.

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CCSS.6.RP.A.3C

Front

If a recipe requires 2 cups of sugar for 5 servings, how much sugar is needed for 15 servings?

Back

6 cups.

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CCSS.6.RP.A.3B

Front

What is the formula for calculating the total amount in an account after earning simple interest?

Back

Total Amount = Principal + Interest.

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CCSS.7.RP.A.3

Front

How much interest will Diego earn in 1 year if he puts $300 in a bank account earning 4% interest?

Back

$12.

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CCSS.7.RP.A.3