Proportions and Problem Solving Section 6.3
A 16-oz Cinnamon Mocha Iced Tea at a local coffee shop has 80 calories. How many calories are there in a 28-oz Cinnamon Mocha Iced Tea? 2 Solving Problems by Writing Proportions Solve the proportion. Cross multiply. Simplify the right side. Divide both side by 140. A 28-oz Cinnamon Mocha Iced Tea has 140 calories. Martin-Gay, Prealgebra, 5ed
Helpful Hint When writing proportions to solve problems, write the proportions so that the numerators have the same unit measures and the denominators have the same unit measures. For example, 3 Martin-Gay, Prealgebra, 5ed