Question

12 is 20%of what number​

Answer 1

let's say is "x", thus "x" is the 100%, so, if "x" is the 100% and we know 12 is 20% of that, what's "x"?

$\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} x&100\\ 12&20 \end{array}\implies \cfrac{x}{12}=\cfrac{100}{20}\implies \cfrac{x}{12}=5\implies x = 60$

Answer 2

12 is 20% of 60

Work is provided in the image attached.