Ratios Review

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 write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 4:1), as a fraction (e.g., 4/1), or with the word 'to' (e.g., 4 to 1).

Front

What does it mean for ratios to be equivalent?

Back

Equivalent ratios are ratios that express the same relationship between numbers, even if the numbers themselves are different.

Front

If the ratio of 6th graders to 7th graders is 4:1 and there are 8 7th graders, how many 6th graders are there?

Back

32 6th graders.

Front

Which of the following ratios is not equivalent to the others: 1:2, 2:4, 4:8, 6:8?

Back

6:8 is not equivalent.

Front

What is the unit rate?

Back

The unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'per' (e.g., miles per hour).

Front

Ilana made $45 babysitting for 6 hours. How much does she make per hour?

Back

$7.50 per hour.

Front

What is a part-to-part ratio?

Back

A part-to-part ratio compares two different parts of a whole, such as the ratio of boys to girls in a class.

Front

What is a part-to-whole ratio?

Back

A part-to-whole ratio compares one part of a whole to the entire whole, such as the ratio of boys to the total number of students.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor.