there are 12 inches in 1 foot, so how many feet in 20 inches?
[tex]\begin{array}{ccll} in&ft\\ \cline{1-2} 12&1\\ 20&x \end{array}\implies \cfrac{12}{20}=\cfrac{1}{x}\implies \cfrac{3}{5}=\cfrac{1}{x}\implies 3x=5\implies x = \cfrac{5}{3}\implies x = 1\frac{2}{3}~~ft[/tex]
