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Unit Rates and Ratios

Unit Rates and Ratios. Ratio – a comparison of two things EX: I run 4 days out of the week. 4 days 7 days. Rate - . A comparison of two things with different units EX: If you use 3 gallons of gas to drive 63 miles, your rate is 3 gallons: 63 miles -or-. 3 gal 63 miles.

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Unit Rates and Ratios

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  1. Unit Rates and Ratios • Ratio – a comparison of two things EX: I run 4 days out of the week. 4 days 7 days

  2. Rate - • A comparison of two things with different units EX: If you use 3 gallons of gas to drive 63 miles, your rate is 3 gallons: 63 miles -or- 3 gal 63 miles

  3. Unit Rate - • Rate that compares a quantity to 1 “Per” means 1 EX: 63 miles/3 gallons = 21 1 Miles gallons

  4. Mickey is baking a layer cake for the school bake sale. Her recipe calls for 3 cups of flour to make 2 layers. How many cups of flour will Mickey use per cake layer? Cups of flour Cake layers So 3 2 =

  5. Proportional Relationships EX: 5 15 Pounds Cups 25 X =

  6. Solve for X by finding the cross products 5X = 25•15 5X = 375 5 5 X= 75 5 15 25 X =

  7. *always look to simplify the fractions first (if possible) 5 15 25 X = 1 3 25 X =

  8. Answer these 5 questions 15 4 3 g = 1.6 m 2 3 = 45 5 d 7 = 4.5 5 t 7 = 30 a 8 20 =

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