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# Ratios and Unit Rates

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### Ratios and Unit Rates

1. 1. Ratio, Rate & Unit Rate 1)Rate or ratio – a comparison of two items Ex. The ratio of smiley- faces to hearts is: 2) Unit rate or cost – when one of the numbers equals 1 Ex. 2:1 2 4 2:4 2to4
2. 2. Ex 1: Find the unit rate or unit price. A) hours4 miles100 B) cans4 402.\$ 25 1004= = 25 mi/hour 60.0 40.24= = \$.60/can
3. 3. Find the total amount using the unit rate. \$5.25 per hour for 7 hours \$6.32 per hour for 5 hours 5.25 x 7 = \$36.75 6.32 x 5 = \$31.60
4. 4. Ex 2: Find the unit rate, then solve. A) A 2 lb. package of candy costs \$3.98; a 3 lb. package costs \$5.67. Which is a better buy? 99.1 98.32 89.1 67.53 \$1.89/lb. is cheaper than \$1.99/lb., so the 3 lb. package is a better buy.
5. 5. Homework: P. 234 #1-8, 10-19, 21-24 Show your work!