Number of cups of flour used to make 1/8 of a cake = 1/5
Number of cups of flour needed to make 1 cake = x
[tex]\begin{gathered} x\times\frac{1}{8}=\frac{1}{5} \\ \frac{x}{8}=\text{ }\frac{1}{5} \\ 5x\text{ =8} \\ x\text{ = }\frac{8}{5} \\ x\text{ = 1}\frac{3}{5} \end{gathered}[/tex][tex]1\frac{3}{5}\text{ cups of flour are n}eeded\text{ to make a whole cake}[/tex]