Ratios/Rates/Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, 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 rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or cost per item.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

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CCSS.7.RP.A.2A

Front

How do you find the cost per pound of an item?

Back

To find the cost per pound, divide the total cost by the total weight in pounds.

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CCSS.6.RP.A.2

CCSS.6.RP.A.1

Front

If a car travels 330 miles in 5 hours, how do you calculate the speed?

Back

To calculate speed, divide the distance traveled by the time taken: Speed = Distance / Time.

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CCSS.6.RP.A.3B

Front

What is the formula to find the unit price of an item?

Back

Unit Price = Total Price / Number of Units.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you solve for an unknown in a proportion?

Back

Cross-multiply the ratios and then solve for the unknown variable.

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CCSS.7.RP.A.2C

Front

If 20 adult tickets cost $250, how do you find the cost of one adult ticket?

Back

Divide the total cost by the number of tickets: Cost per ticket = Total Cost / Number of Tickets.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the relationship between distance, speed, and time?

Back

The relationship is expressed as: Distance = Speed × Time.

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CCSS.6.RP.A.3B

Front

How do you calculate the price per gallon of gas?

Back

To calculate the price per gallon, divide the total cost by the total gallons: Price per gallon = Total Cost / Total Gallons.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2