Ratio Rate Proportion Review

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.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with different units, such as speed (miles per hour) or price per item.

Front

What is a proportion?

Back

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

Front

How do you determine if two ratios form a proportion?

Back

Cross-multiply the ratios. If the products are equal, the ratios form a proportion.

Front

What is a unit price?

Back

A unit price is the cost per single unit of measure, allowing for comparison of prices across different quantities.

Front

How do you calculate the unit price?

Back

Divide the total price by the number of units to find the unit price.

Front

If a 4-pack of t-shirts costs $2.24, what is the unit price?

Back

Unit price = $2.24 / 4 = $0.56 per t-shirt.

Front

If a 6-pack of t-shirts costs $3.12, what is the unit price?

Back

Unit price = $3.12 / 6 = $0.52 per t-shirt.

Front

If a 8-pack of t-shirts costs $4.24, what is the unit price?

Back

Unit price = $4.24 / 8 = $0.53 per t-shirt.

Front

What is the better buy between a 4-pack for $2.24 and a 6-pack for $3.12?

Back

The 6-pack for $3.12 is the better buy because it has a lower unit price.