Unit 1 Day 1 Notes Ratios & Rates Ratio: Comparison of two or more quantities. Ex. A hockey score of 3 to 2. Ex. For every 6 boys there are 10 girls in the grade. Ex. Oranges are on sale for $4.00 for 12 oranges. Write the ratio two different ways, per orange and per dollar. Ex. The ratio of blue pens to red pens on my desk is 3:4. If I have 15 blue pens, how many red pens do I have? Unit Rate: rate of ONE UNIT of a given quantity. Ex. I drove 81 miles on 3 gallons of gas. How many miles did I get per gallon. Ex. Steak is on sale 4 pounds for $9. What is the ratio of the number of dollars to the number of pounds? Ex. Use the table below to find the number of boxes needed to hold the amount of markers. Markers 100 120 150 Boxes 12.5 15 ? Ex. Use the information in the table to find the price of 12 pounds of apples. Apples (in lbs) 4 8 12 Price (in $) 2.96 5.92 ?
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Unit 1 Day 1 Notes Ratios & Rates Ratio: Comparison of two or more quantities. Ex. A hockey score of 3 to 2.
Ex. For every 6 boys there are 10 girls in the grade.
Ex. Oranges are on sale for $4.00 for 12 oranges. Write the ratio two different ways, per orange and per dollar.
Ex. The ratio of blue pens to red pens on my desk is 3:4. If I have 15 blue pens, how many red pens do I have?
Unit Rate: rate of ONE UNIT of a given quantity. Ex. I drove 81 miles on 3 gallons of gas. How many miles did I get per gallon.
Ex. Steak is on sale 4 pounds for $9. What is the ratio of the number of dollars to the number of pounds?
Ex. Use the table below to find the number of boxes needed to hold the amount of markers.
Markers 100 120 150 Boxes 12.5 15 ?
Ex. Use the information in the table to find the price of 12 pounds of apples.
Apples (in lbs) 4 8 12
Price (in $) 2.96 5.92 ?
Percent & Proportion Word Problems A is the % B is the whole C is the part
Find C: A% × B Find B: C ÷A% Find A: C ÷ B
Ex. What percent of 37 is 4?
Ex. 38% of 73 is what?
Ex. What is 14% of 29.5?
Ex. One melon costs $3. How many melons can you buy for $15?
Ex. Megan took a trip to Mexico. She decided to convert all her Pesos back into dollars. How many dollars did she receive if she exchanged 42.7 Pesos at a rate of $5.30 = 11.1 Pesos?
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