Ratios, Rates, & 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

How do you find a unit rate?

Back

To find a unit rate, divide the total amount by the number of items. For example, if 10 dollars buys 9 chocolate bars, the unit rate is $10 ÷ 9 = $1.11 per chocolate bar.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or dollars per item.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if 1/2 = 2/4, then these two ratios are in proportion.

Front

Find the unit rate: 16 dollars for 5 books = $___________ per book

Back

$3.20 per book.

Front

Find the unit rate: 9 chocolate bars cost 10 dollars = $___________ per chocolate bar

Back

$1.11 per chocolate bar.

Front

If there are 88 students in 4 classes, how many students are in each class?

Back

22 students per class.

Front

Write the ratio of STARS to SQUARES if there are 3 stars and 4 squares.

Back

3 to 4.

Front

What is the ratio of triangles to squares if there are 4 triangles and 3 squares?

Back

4:3.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities, such as 1/2 = 2/4.