Ratios and Proportions

Front

What is a Ratio?

Back

A comparison of two quantities.

Front

What is a Proportion?

Back

An equation that states two ratios are equal.

Front

How do you write a ratio?

Back

Ratios can be written in three ways: as a fraction (5/7), with a colon (5:7), or with the word 'to' (5 to 7).

Front

What is the proportional constant?

Back

The constant ratio between two proportional quantities.

Front

If there are 3 apples and 5 oranges, what is the ratio of oranges to apples?

Back

5 to 3.

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

2 to 3.

Front

What is the cross-multiplication method used for?

Back

To determine if two ratios form a proportion.

Front

If 4 stickers cost $2.50, what is the cost of 1 sticker?

Back

$0.625.

Front

If a car travels 60 miles in 1 hour, what is the ratio of distance to time?

Back

60 miles per hour.

Front

What is a unit rate?

Back

A comparison of two different quantities when they are combined into a single unit.