Question

which is best to buy


A( 16 ounces of hand soap for $2.40


B( 20 ounces of hand soap for $2.80


C( 24 ounces of hand soup for $3.00


D( 12 ounces of hand soup for $2.00

Answer 1

Can I help?

Answer 2

Divide the ounces by the cost and the smallest number will be your answer.

Answer 3

I think it is d

Answer 4

@BigPoppa117 If you do that, divide the ounces by the cost, then the smallest number will be the least amount of ounces per dollar which is the highest price. Then the highest number will be the cheapest.

Answer 5

But you want the lowest cost per ounce.

Answer 6

The more common way of solving this is to divide every cost by the number of ounces to find the unit price per ounce.
Then the lowest number is the cheapest and is the one you should choose.

Answer 7

Okay I see, so I just switched the things you are supposed to divide by.

Answer 8

Yes, you are correct.
You want the lowest cost per ounce.
That means you need to find all the costs per ounce.
Per means division, so cost per ounce means divide the cost by the ounces.

Answer 9

Great.
Your method still works, but you need to look for the highest number instead.

Answer 10

@meep
Don't just guess.
For each choice, divide the price by the ounces.
Write them all out.
Then choose the lowest number.

Answer 11

D happens to be the worst choice. It's the most expensive one per ounce.

Answer 12

A.) 6.6
b.)7
c.)4
d.)6
when divided

Answer 13

@megan.brennan
After dividing, do you pick the largest or the smallest number?