## Basic College Mathematics (9th Edition)

$\frac{28 people}{7 cars}=\frac{16 people}{4 cars}$
We are given that 28 people is to 7 cars as 16 people is to 4 cars. In order to write this as a proportion, we can write both relations as fractions. 28 people is to 7 cars can be written as $\frac{28 people}{7 cars}$ 16 people is to 4 cars can be written as $\frac{16 people}{4 cars}$ Next, we can set both fractions equal to each other, which gives us a proportional relationship. $\frac{28 people}{7 cars}=\frac{16 people}{4 cars}$ Since the units in the numerators and denominators are different, we do not simplify any further.