It is estimated that you will need 27 quarts of water for an upcoming camping trip. How many gallons of water must you bring along to have enough?

Question

jdoe0001 · Answer

well, one QUART is really one QUARTer of something, or 1/4
in this liquid units, one quart is 1/4 of a gallon
well, there are 27 quarts, how many gallons are there then?

jdoe0001 · Answer

or $\begin{array}{ccllll}
gallon&quarts
\\hline\
1&4\
x&27
\end{array}\implies \cfrac{1}{x}=\cfrac{4}{27}$