Finding a Rate by Dividing Two Quantities

While there is no physical way to divide two different quantities like (5 miles)/(2 hours), students make use of the structure of division and ratios to model (5 miles)/(2 hours) as a quantity 2.5 mph. Students use this interpretation of a rate in word problems when multiplying a rate by a quantity. Students can be part of the discussion on how to solve each problem, but the teacher should be modeling the process. At what rate does the Burger Master make hamburgers?