1A Ratios

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another.

Front

How do you write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 2:3), as a fraction (e.g., 2/3), or with the word 'to' (e.g., 2 to 3).

Front

What is a part-to-part ratio?

Back

A part-to-part ratio compares one part of a whole to another part of the same whole.

Front

What is a part-to-whole ratio?

Back

A part-to-whole ratio compares one part of a whole to the entire whole.

Front

If there are 2 dogs and 4 cats, what is the ratio of dogs to all pets?

Back

The ratio of dogs to all pets is 2:6 or simplified to 1:3.

Front

In a bag of 10 M&Ms, if 3 are red, what is the ratio of red M&Ms to the total?

Back

The ratio of red M&Ms to the total is 3:10.

Front

What is the ratio of boys to girls if there are 13 boys and 10 girls?

Back

The ratio of boys to girls is 13:10.

Front

If the ratio of girls to boys is 3:1, how many boys are there if there are 9 girls?

Back

If there are 9 girls, there are 3 boys (since 3:1 means for every 3 girls, there is 1 boy).

Front

What does it mean if a ratio is simplified?

Back

A simplified ratio is expressed in the smallest whole numbers possible.

Front

How do you find the total number of parts in a ratio?

Back

To find the total number of parts, add the numbers in the ratio together.