Proportions and Unit Rates

Front

What is a proportion?

Back

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

Front

How do you find a unit rate?

Back

To find a unit rate, divide the quantity by the number of units. For example, if you travel 150 miles in 5 hours, the unit rate is 150 miles ÷ 5 hours = 30 miles per hour.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

If a car travels 240 miles in 4 hours, what is the unit rate?

Back

60 miles per hour.

Front

What is the formula for solving proportions?

Back

Cross-multiply the two ratios and set them equal to each other.

Front

If 3 apples cost $1.50, what is the cost of 1 apple?

Back

$0.50 per apple.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions state that two ratios are equal.

Front

How can unit rates help in making decisions?

Back

Unit rates allow for easy comparison of prices or rates, helping to determine the best value.

Front

If a recipe requires 2 cups of flour for 4 servings, how much flour is needed for 1 serving?

Back

0.5 cups of flour.

Front

What is the unit rate of 100 miles in 2 hours?

Back

50 miles per hour.