Ratio & Proportions

Presentation

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Mathematics

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7th Grade

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Practice Problem

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Medium

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CCSS

6.RP.A.3B, 7.RP.A.2B, 7.RP.A.2C

Standards-aligned

Zachary Brown

Used 12+ times

FREE Resource

4 Slides • 4 Questions

Ratio & Proportions

Multiple Choice

Solve the proportion.

\frac{2}{5}=\frac{x}{12}

x = 2

x = 4.8

x = 24

x =6.3

Multiple Choice

A satellite is 18 meters wide. A model of it was built with a scale of 1 centimeter : 3 meters. How many centimeters is the model?

6 meters

6 centimeters

54 meters

54 centimeters

Setting Up Proportions

Match Units Together
There are multiple ways to setup, so be CONSISTENT!
For Example,
1 cup of rice, needs 2.25 cups of water
If I only have 0.75 cups of rice, how much water will I need?

Book Club Reads!

Our First Book!
180 pgs
Reading plan was 25pgs per 1 month
How long will it take us to read the book?

Next Read!

My next book club read!
221 pages
Each participant will read 18 pgs every 2 weeks.
How long will it take to read the book?

Multiple Choice

The average rate of hair growth is 2.5 centimeters every 2 months. At that rate, how many months will it take to grow 22.5 centimeters of hair? Which setup is appropriate to solve the proportion?

$\frac{1\ months}{2.5\ centi}=\frac{22.5centi}{x}$

$\frac{2.5\ centi}{2\ months}=\frac{22.5\ centi}{x}$

$\frac{22.5\ centi}{2\ months}=\frac{x}{2.5\ centi}$

$\frac{1}{2.5\ centi}=\frac{x}{22.5\ centi}$

Multiple Choice

The average rate of hair growth is 2.5 centimeters every 2 months. At that rate, how many months will it take to grow 22.5 centimeters of hair?

9 months

11.25 months

18 months

28 months

Ratio & Proportions

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