Proportions

Front

What is a proportion?

Back

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

Front

How do you write a ratio?

Back

A ratio can be written in three ways: as a fraction (1/3), with a colon (1:3), or with the word 'to' (1 to 3).

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

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.

Front

How do you find a missing value in a proportion?

Back

To find a missing value in a proportion, you can cross-multiply and solve for the unknown.

Front

What does it mean if two quantities are proportional?

Back

If two quantities are proportional, it means that as one quantity increases or decreases, the other quantity does so at a constant rate.

Front

If 5 apples cost $10, what is the cost of 1 apple?

Back

The cost of 1 apple is $2.

Front

What is the formula for finding the unit rate?

Back

The formula for finding the unit rate is: Unit Rate = Total Quantity / Number of Units.

Front

If a car travels 150 miles in 3 hours, what is its speed in miles per hour?

Back

The speed of the car is 50 miles per hour.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, and they represent the same relationship between two quantities.