Objective- To compare ratios and rates. Ratio -A comparison of two whole numbers in the same units. 5 girls to 7 boys 4 Possible Ways to Write a Ratio.

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Presentation transcript:

Objective- To compare ratios and rates. Ratio -A comparison of two whole numbers in the same units. 5 girls to 7 boys 4 Possible Ways to Write a Ratio sometimes... 5 out of 12 as in 5 girls out of 12 students

Simplify each ratio below. 1) 2) 3) 4) 5) 6)

RatioRate - a comparison of two whole numbers in the same units. - a comparison of a number to one in different units. - always written as two numbers. - always written as a single number on a per unit basis. - never write the units.- always write the units. - reduce to simplify.- divide to simplify.

Find the unit rate. 1) 84 students in 4 classrooms 2) $30 for 8 lunches 3) 15,000 cars sold by 2000 dealers

Reciprocal Rates 8 oranges for 2 dollars Unit RateReciprocal Rate $87.50 for 5 tickets Unit RateReciprocal Rate

Rate Multiplication Your heart beats 70 beats/min. How many beats per hour is this? StartFinish Rates

Rate Multiplication Joe reads 12 pages per day. How long would it take him to read a 684 page book? StartFinish Rates

Rate Multiplication The world record for the 100 yard dash is 9.4 seconds. How fast is this in miles/hr? StartFinish Rates