$0.7=\frac{ n }{ 4.8 }$
Convert the decimal into a fraction$0.7=\frac{ n }{ \frac{ 24 }{ 5 } }$
Simplify the complex fraction$0.7=\frac{ 5n }{ 24 }$
Multiply both sides of the equation by $\frac{ 24 }{ 5 }$$\frac{ 24 }{ 5 } \times 0.7=n$
Convert the decimal into a fraction$\frac{ 24 }{ 5 } \times \frac{ 7 }{ 10 }=n$
Cancel out the greatest common factor $2$$\frac{ 12 }{ 5 } \times \frac{ 7 }{ 5 }=n$
Multiply the fractions$\frac{ 84 }{ 25 }=n$
Swap the sides of the equation$\begin{align*}&n=\frac{ 84 }{ 25 } \\&\begin{array} { l }n=3 \frac{ 9 }{ 25 },& n=3.36\end{array}\end{align*}$