Proportions and Unit Rates

Front

What is a proportion?

Back

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

Front

Define unit rate.

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total price by the number of units.

Front

If a 12 oz drink has 170 calories, how many calories are in 1 oz?

Back

To find calories per ounce, divide 170 by 12, which equals approximately 14.17 calories per oz.

Front

What is the formula to calculate miles per gallon?

Back

Miles per gallon = Total miles traveled / Total gallons used.

Front

If you travel 150 miles on 5 gallons, what is the miles per gallon?

Back

30 miles per gallon.

Front

How do you calculate the cost per item?

Back

Cost per item = Total cost / Number of items.

Front

If 5 ice cream bars cost $12.25, how much is one ice cream bar?

Back

$2.45 per ice cream bar.

Front

What is the relationship between proportions and equivalent fractions?

Back

Proportions are equivalent fractions that show two ratios are equal.

Front

How can you determine which of two items is a better deal based on unit price?

Back

Compare the unit prices; the item with the lower unit price is the better deal.