Video Solutions to help Grade 6 students learn how to solve problems by comparing different ratios using two or more ratio tables.

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Lessons for Grade 6

Common Core For Grade 6

• Students solve problems by comparing different ratios using two or more ratio tables.

Lesson 11 Summary

Ratio tables can be used to compare two ratios. Look for equal amounts in a row or column to compare the second amount associated with it.

You can also extend the values of the tables in order to get comparable amounts. Another method would be to compare the values of the ratios. Write the values of the ratios as fractions and then use your knowledge of fractions to compare the ratios.

When ratios are given in words, students can create a table of equivalent ratios in order to compare the ratios.

Example 1

Create four equivalent ratios (2 by scaling up and 2 by scaling down) using the ratio 30 to 80.

Write a ratio to describe the relationship shown in the table.

Exercise 1

The following tables show how many words each person can text in a given amount of time. Compare the rates of texting for each person using the ratio table.

Complete the table so that it shows Max has a texting rate of 55 words per minute.

Exercise 2: Making Juice (Comparing Juice to Water)

a. The tables below show the comparison of the amount of water to the amount of juice concentrate (JC) in grape juice made by three different people. Whose juice has the greatest water-to-juice concentrate ratio, and whose juice would taste strongest? Be sure to justify your answer.

Put the juices in order from the juice containing the most water to the juice containing the least water.

Explain how you used the values in the table to determine the order.

What ratio was used to create each table?

Explain how the ratio could help you compare the juices.

b. The next day, each of the three people made juice again, but this time they were making apple juice. Whose juice has the greatest water-to-juice concentrate ratio, and whose juice would taste the strongest? Be sure to justify your answer.

Put the juices in order from the strongest apple taste to the weakest apple taste.

Explain how you used the values in the table to determine the order.

What ratio was used to create each table?

Explain how the ratio could help you compare the juices.

How was this problem different than the grape juice questions?

c. Max and Sheila are making orange juice. Max has mixed 15 cups of water with 4 cups of juice concentrate. Sheila has made her juice by mixing 8 cups water with 3 cups of juice concentrate. Compare the ratios of juice concentrate to water using ratio tables. State which beverage has a higher juice concentrate-to-water ratio.

d. Victor is making recipes for smoothies. His first recipe calls for 2 cups of strawberries and 7 cups of other ingredients. His second recipe says that 3 cups of strawberries are combined with 9 cups of other ingredients. Which smoothie recipe has more strawberries compared to other ingredients? Use ratio tables to justify your answer.