Question

How much water must be added to 64 ounces of pure grape juice to make the juice only 70% grape juice?​

Answer 1

192/7 or approximately 27.429 ounces

Explanation:

Let the amount of water added, in ounces, be
`w`. Set up the following equation:

`\displaystyle \\(64)/(64+w)=0.7`

Multiply both sides by
`64+w`:

`\displaystyle\\64=0.7(64+w)\\64=44.8+0.7w,\\w=(19.2)/(0.7)=\boxed{(192)/(7)}`

Answer 2

6 grape

Explanation: