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A ratio is a comparison of two things. We might compare boys to girls, cars to trucks or hours asleep to hours awake.

Whatever we choose to compare can then be written as a ratio. There are three different forms.

A ratio can be written as 'a to b, a : b 'or  

Here are some examples:

1.) 4 boys and 5 girls would be written as 4 to 5, 4 : 5 or 

2.) 3 parts yellow and 4 parts blue would be written as 3 to 4, 3 : 4, or 

Ratios can be part-to-part, part-to-whole, or whole-to-part. Let's take a look at what this means.

A ratio is a comparison of two things. We might compare boys to girls, cars to trucks or hours asleep to hours awake.

Whatever we choose to compare can then be written as a ratio. There are three different forms.

A ratio can be written as 'a to b, a : b 'or  

Here are some examples:

1.) 4 boys and 5 girls would be written as 4 to 5, 4 : 5 or 

2.) 3 parts yellow and 4 parts blue would be written as 3 to 4, 3 : 4, or 

Ratios can be part-to-part, part-to-whole, or whole-to-part. Let's take a look at what this means.

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