Question

John needs 7 gallon bottles of water to fill 90water balloons how many gallon bottles of water does John need to purchase to fill up 140 water balloons

Answer 1

11 bottles

Explanation:

make a proportion because if you're using the same rate proportions can show that it's equal

`(7)/(90) = (x)/(140)`

cross multiply

`7 *140`
`= 980`

divide the answer by 90 to find x

`980/90= 10.8`

round to 11 because you can't have 10.8 bottles