Question

Four friends bought books at a bookstore. The person who got the best deal has the lowest ratio of cost to number of books purchased. Book Purchases Name Total Cost Number of Books Jo $9 4 Kei $12 8 Kate $30 16 Bryn $8 4

Answer 1

Answer:

Kei got the best deal.

Explanation:

The ratio of cost to number of books purchased for all of four friends will be.....

Jo ⇒  $\frac{9}{4}$, Kei ⇒ $\frac{12}{8}$ , Kate ⇒  $\frac{30}{16}$, Bryn ⇒ $\frac{8}{4}$

From here you have to find the common denominator in this case is 16.

$\frac{9}{4} =\frac{9*4}{4*4} =\frac{36}{16}$

$\frac{12}{8} =\frac{12*2}{8*2} =\frac{24}{16}$

$\frac{30}{16} =\frac{30*1}{16*1} =\frac{30}{16}$

$\frac{8}{4} =\frac{8*4}{4*4} =\frac{32}{16}$

As you could tell the lowest is $\frac{24}{16}$ so the lowest is Kei.