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Real-Life Ratios Notes

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Real-Life Ratios Notes

Help plan snacks and drinks for a community pop-up café. A ratio compares quantities by division. Keep the order of the quantities clear: 3:2 means 3 of the first quantity for every 2 of the second. Simplify ratios by dividing every part by the same factor; make equivalent ratios by multiplying every part by the same factor.

Read and Write Ratios

Write ratios in the order named. A ratio can compare two quantities or part of a group to the whole group.

1.A café snack mix contains 6 pretzels and 4 crackers. Write the ratio of pretzels to crackers in simplest form.
2.A fruit cup contains 5 strawberries and 3 blueberries. Which ratio represents strawberries to blueberries?
  • 3:5
  • 5:3
  • 5:8
  • 8:5
3.A café tray has 4 blueberry muffins and 6 chocolate muffins. What is the ratio of blueberry muffins to all muffins? Give the simplest form.

Scale a Recipe

Equivalent ratios describe the same relationship at different sizes. Multiply or divide every part by the same number.

4.A lemonade recipe uses 2 cups of lemon juice for every 5 cups of water. How many cups of water are needed for 6 cups of lemon juice?
5.The recipe ratio of lemon juice to water is 2:5. Complete the equivalent ratio: 2:5 = 8:.
6.Gabriela says that 3:4 and 12:16 are equivalent ratios. Is Gabriela correct? Explain briefly.
7.The café mixes 4 scoops of cocoa with 10 scoops of powdered milk. For a smaller batch using 2 scoops of cocoa, how many scoops of powdered milk keep the same ratio?

Ratios in the Café

Compare quantities carefully. For a rate, include the units so the meaning is clear.

8.On Saturday, the café sells 18 iced teas and 12 lemonades. Write the ratio of iced teas to lemonades in simplest form.
9.A baker decorates 24 cookies in 3 minutes at a steady pace. How many cookies does the baker decorate per minute?
10.A menu says the ratio of grilled cheese sandwiches to tomato soup cups is 2:3. To make a larger order, Carlos changes it to 4:5. Explain why this does not keep the same ratio, and give a correct larger ratio with 4 sandwiches.

2 printable pages

  • Real-Life Ratios Notes, page 1 of 2: Read and Write Ratios, Scale a Recipe

    Page 1

  • Real-Life Ratios Notes, page 2 of 2: Ratios in the Café

    Page 2

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