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A comparison of two quantities is called a _________. ratio.

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Presentation on theme: "A comparison of two quantities is called a _________. ratio."— Presentation transcript:

1 A comparison of two quantities is called a _________. ratio

2 rhombi to trapezoids 6 to 4 64646464 6:4 part-to-part

3 shapes to rhombi 10 to 6 10 6 10:6 whole-to-part

4 rhombi to shapes 6 to 10 6 10 6 10 6:10 part-to-whole

5 35353535 ÷ = 22222222

6 12 13 n 52 n 52 = × = 44444444 48 52

7 54 18 9n9n9n9n = ÷ = 66666666 93939393

8 Carmen is making a mobile using rhombi and other shapes. The mobile needs to have a ratio of 3 rhombi for every 6 shapes. How many rhombi does Carmen need if she makes a mobile with 12 shapes? with 18 shapes? with 24 shapes?

9 rhombi6 shapes6121824 3912

10 A rate or ratio that has 1 as the second term is a(n) _________. unit rate

11 Samuel earned $9 for working 2 hours. What is Samuel’s unit rate or rate per hour? $9 2 hr $9 2 hr n 1 hr n 1 hr = $9 2 hr $9 2 hr $4.50 1 hr ÷ = 22222222

12 Samuel earned $9 for working 2 hours. What is Samuel’s unit rate or rate per hour? $4.50 1 hr $31.50 7 × = $4.50 × 7 $31.50 3

13 If a car traveled 3 hours at 55 mi/hr, what was the distance the car traveled? 55 mi 1 hr 165 mi 3 × = 55 × 3 165 1

14 4 minutes at 75 m/1 min 300 m 4 × = 75 m 1 min 75 × 4 300 2

15 5 days at 20 km/day 5 × = 20 km 1 d 100 km

16 46% 46 100 46 100 0.46 46 100 46 100 ÷ = 22222222 23 50 46% 23% 20% 7%4% PacificAtlanticIndianArcticOther

17 23% 23 100 23 100 0.23 46% 23% 20% 7%4% PacificAtlanticIndianArcticOther

18 20% 20 100 20 100 0.20 ÷ = 20 20 15151515 46% 23% 20% 7%4% PacificAtlanticIndianArcticOther

19 4% 4 100 4 100 0.04 ÷ = 44444444 1 25 1 25 46% 23% 20% 7%4% PacificAtlanticIndianArcticOther

20 7% 7 100 7 100 0.07 46% 23% 20% 7%4% PacificAtlanticIndianArcticOther

21 On a science test, Cassie answered 18 out of 20 questions correctly. What percent of the questions did she get correct? 18 20 × = 55555555 90 100 90 100 = 90% = n 100 n 100 18 × 5 90 4

22 On a science test, Cassie answered 18 out of 20 questions correctly. What percent of the questions did she get correct? = 90% 2 180 1 80 0 09 − 0..0

23 This summer, 38 relatives attended our annual family reunion. What percent of our 50 relatives attended? 38 50 × = 22222222 76 100 76 100 = 76% = n 100 n 100 38 × 2 76 1

24 This summer, 38 relatives attended our annual family reunion. What percent of our 50 relatives attended? 76% 5 380 3 50 0 07 − 0..6 30 3 00 0 − 0

25 A board game that is regularly priced at $50 is on sale for 20% off the original price. What is the discount? 2 × $5 = $10

26 A board game that is regularly priced at $50 is on sale for 20% off the original price. What is the discount? 20 100 20 100 ÷ = 22222222 10 50 $10 = n 50 n 50

27 A board game that is regularly priced at $50 is on sale for 20% off the original price. What is the discount? 50 × 0.20 $10.00

28 A sweater that is regularly priced for $25 is on sale for 80% off the original price. What is the discount? What is the sale price of the sweater? $2.50 × 8 $20.00 4

29 A sweater that is regularly priced for $25 is on sale for 80% off the original price. What is the discount? What is the sale price of the sweater? 80 100 80 100 ÷ = 44444444 20 25 $20 = n 25 n 25

30 A sweater that is regularly priced for $25 is on sale for 80% off the original price. What is the discount? What is the sale price of the sweater? $25 × 0.80 $20.00 4

31 A sweater that is regularly priced for $25 is on sale for 80% off the original price. What is the discount? What is the sale price of the sweater? $25 − $20 = $5


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