Lesson 23 ratio and rate

A ratio is a way to describe a relationship between numbers

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If there are 13 boys and 15 girls in a room. The ratio​ of boys to girls is

13 to 15​

​ORDER IS IMPORTANT

Ratio

​WAYS TO WRITE RATIO

write in the order it is asked​

The ratio of boys to girls is ​

13 to 15

13:15

13/15 ​

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If writing it as a fraction​ reduce the way we reduce fractions. Leave it as a fraction. No mixed numbers.​

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Example 1:

A team lost 3 games and won 7 games. What was the teams win-loss ratio?

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​Example 2:

In a class of 28, there are 13 boys. What is the ratio of boys to girls?​

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On a bike trip, Jeremy rode 60 miles, in 4 hours. What was his average speed in miles per hour?​

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​Tim's car averages 32 miles per gallon on the highway. Predict about how far he can go on 10 gallons of fuel. ​

What is ratio of dogs to cats in neighborhood that has 19 cats and 12 dogs?

​What is the girl-boy ratio in a class of 30 students with 17 boys?

​If the ratio of cars to trucks is 7 to 2, what is the ratio of trucks to cars?

If a 4-quart container of milk cost $2.48, what is the cost per quart?​

How long will it take a trucker to drive 400 miles at 50 miles per hour?