Comparing Ratios

6.RP.3a

Write the equivalent fractions represented by the models

A. 6/15 = 2/5 B. 2/10 = 3/5 C. 3/15 = 1/5D. 6/10 = 2/5

I want to learn about Ratios and Proportions

Essential Question: How do you write ratios and equivalent ratios?

My Goal For Today :_____________________write ratios and make

equivalent ratios

I can write equivalent ratios in tables.

Anna’s recipe for lemonade calls for 2 cups of lemon juice and 3 cups of water. Bailey’s recipe calls for 3 cups of lemon juice and 5 cups of water.

1. In Anna’s recipe, the ratio of lemon juice to water is:__________________. Complete the table with equivalent ratios.

Lemon Juice (c) 2 4Water (c) 3 9 15

Guided Practice

2. In Bailey’s recipe, the ratio of lemon juice to water is:__________________.Complete the tables with equivalent ratios.

3. In each table, there is a column in which the amount of water is the same. Circle these columns in the tables.

Lemon Juice (c) 3 9 12Water (c) 5 25

Guided Practice

Reflect

Examine these two columns. Whose recipe makes stronger lemonade? How do you know?

Examples on your own

Complete the table.

Examples on your own

Examples on your own

A spaceship is traveling at a steady rate. The table shows the distance the spaceship travels in a given period of time. Find the

distance the spaceship travels in 4 minutes.

A. 600 miles B. 800 milesC. 520 miles D. 1,080 miles

The table shows the price of different numbers of magazines. Predict the cost of

5 magazines. A. $14.00B. $20.00C. $25.00D. $31.00

Ed’s macaroni-and-cheese recipe calls for 2 packages of cheddar cheese and 1 package of parmesan cheese. Devon’s macaroni-and-cheese recipe calls for 5 package of

cheddar and 2 packages of parmesan. Whose recipe has a lower ratio of packages of cheddar cheese to package of parmesan cheese?

A. Ed’s B. Devon’s C. neither; the ratios are equivalentD. none

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