Question

I can buy 56 diapers at Babies-R-Us for $28, and I can buy 112 diapers online for $52. Which is the better deal, and how much will you save per diaper?

Answer 1

Online diaper deal is better and you will save $0.04 per diaper

Explanation:

Case 1: Babies-R-Us

Cost of 56 diapers = $28

Cost of 1 diaper =
`(28)/(56)`

=
`0.5`

So, Cost of 1 diaper at Babies-R-Us is $0.5

Case 2: diapers online

Cost of 112 diapers = $52

Cost of 1 diaper =
`(52)/(112)`

=
`0.46`

So, Cost of 1 diaper at diapers online is $0.46

Difference between cost of 1 diaper of both cases = $0.5-$0.46=$0.04

So, online diaper deal is better and you will save $0.04 per diaper

Answer 2

To answer this question, you will need to do this:
56 diapers divided by $28
=2 (this means it is $2 per diaper)
Next:
112 diapers divided by $52
=2.1538461 ($ per diaper)
Obviously $2 is cheaper than $2.15...
Your answer is therefore 56 diapers for $28
Hope I helped!