Answer:
You would need 5/6 of a gallon to be water, and 1/6 of a gallon to be concentrate.
Step-by-step explanation:
Since it is a 5:1 ratio between water and concentrate, and a total of 1 gallon, you'll split the gallon into sections.
You'll split it into 6 sections, because there is 5 parts of water and 1 part on concentrate, which combined is 6 total parts.
5 of the 6 parts are water, 1 of the 6 parts are concentrate.
To Double-Check:
5/6 of a gallon (water) + 1/6 of a gallon (concentrate) = 1 Gallon
