Solve for: (d)/(5)=(12)/(80)

Expression: $\frac{ d }{ 5 }=\frac{ 12 }{ 80 }$

Cancel out the common factor $4$

$\frac{ d }{ 5 }=\frac{ 3 }{ 20 }$

Simplify the equation using cross-multiplication

$20d=15$

Divide both sides of the equation by $20$

$\begin{align*}&d=\frac{ 3 }{ 4 } \\&d=0.75\end{align*}$