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

Kei got the best deal.

Step-by-step explanation:

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

Jo ⇒
`(9)/(4)`, Kei ⇒
`(12)/(8)` , Kate ⇒
`(30)/(16)`, Bryn ⇒
`(8)/(4)`

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

`(9)/(4) =(9*4)/(4*4) =(36)/(16)`

`(12)/(8) =(12*2)/(8*2) =(24)/(16)`

`(30)/(16) =(30*1)/(16*1) =(30)/(16)`

`(8)/(4) =(8*4)/(4*4) =(32)/(16)`

As you could tell the lowest is
`(24)/(16)` so the lowest is Kei.