Ratios and 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.

Front

What is a proportion?

Back

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

Front

How do you find the unit rate?

Back

To find the unit rate, divide the quantity by the number of units. For example, if a car travels 440 miles in 8 hours, the unit rate is 440 miles ÷ 8 hours = 55 miles per hour.

Front

What does it mean if two quantities are proportional?

Back

Two quantities are proportional if they maintain a constant ratio or rate.

Front

If 8 cartons of raspberries cost $7, how much does 1 carton cost?

Back

1 carton costs $7 ÷ 8 = $0.875.

Front

What is the unit price?

Back

The unit price is the cost per single unit of a product, allowing for comparison between different products.

Front

How do you determine the least expensive unit price?

Back

To determine the least expensive unit price, calculate the price per unit for each option and compare them.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

Front

What is a unit rate in terms of a fraction?

Back

A unit rate is a fraction with a denominator of one, representing a quantity per one unit.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.