Ratios

​Lesson Goal

~use ratios and rates to describe the relationship between two quantities

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~find equivalent ratios and use unit rates to solve multi-step problems.

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​Vocabulary

​Ratio

A ratio is a way to show a relationship or compare two numbers of the same kind.

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We use ratios to compare things of the same type. For example, we may use a ratio to compare the number of boys to the number of girls in your class room.

​Vocabulary

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​Proportion

A PROPORTION is an equation where two ratios are equal.​

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Example: 2 teachers per 20 students equals 3 teachers per 30 students.​

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Multiple Choice

There are 3 different ways to write a Ratio which is NOT one of them?

• 5:8

• 5 To 8

• 5~8

• $$\frac{5}{8}$$  

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​Please Take 4 Min to

complete

Ratios of the Picture

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​https://www.yout-ube.com/watch?v=svXcVN5OPtE

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Open Ended

Create a ratio using the following picture of Pumpkins

Example: 2 with noses to 10 with no nose

​3 ways to find if 2 ratios are Propotional

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Scaling

Cross Multiplication

Divide vertically

Open Ended

$$\frac{2}{3}=\frac{8}{12}$$  Are the proportions equal and What method did you use?

​Using a method explained, determine if these ratios are proportional on your sheet

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