if we take 47.65 to be the 100%, how much is 100% + 20% or 120% of that then?
[tex]\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
47.65&100\\
x&120
\end{array}\implies \cfrac{47.65}{x}=\cfrac{100}{120}\implies \cfrac{47.65\cdot 120}{100}=x[/tex]