Mary delivers 32 newspapers to her customers in 25 minutes. These deliveries represent 64% of her customers. How many customers does Mary have? 16 20 50 57
If 32 customers is 64% of Mary's customers, then set up a simple ratio: [tex] \frac{32}{64} = \frac{?}{100} [/tex] Using cross-multiplication: [tex] \frac{32*100}{64} [/tex] = 50 Mary has 50 customers.
