Calculate Rates and Ratios

Front

What is a ratio?

Back

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

Front

How do you write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 4:3), as a fraction (e.g., 4/3), or with the word 'to' (e.g., 4 to 3).

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 price per item.

Front

How do you calculate the price per item?

Back

To find the price per item, divide the total cost by the number of items.

Front

What is the formula for calculating miles per gallon?

Back

Miles per gallon (MPG) = Total miles driven / Total gallons of gas used.

Front

If a pack of 8 juice boxes costs $4.79, what is the cost per juice box?

Back

Cost per juice box = $4.79 / 8 = $0.598, or about $0.60.

Front

How do you determine which option is a better buy?

Back

To determine the better buy, calculate the cost per unit for each option and compare them.

Front

What is the better deal: $4.39 for 11.5 oz of Doritos or $3.24 for 9.75 oz of Cheetos?

Back

Cheetos is the better deal because it has a lower cost per ounce.

Front

What does it mean if a ratio is simplified?

Back

A simplified ratio is expressed in its lowest terms, meaning that both quantities have been divided by their greatest common factor.

Front

What is the relationship between rates and ratios?

Back

Rates are a type of ratio that specifically compares two different types of units.