Answer :
From the problem, 6 is the 15% of a number.
Translating it to an equation :
[tex]6=15\%\times N[/tex]where N is the number.
Note that 15% = 0.15
So the number is :
[tex]\begin{gathered} 6=0.15N \\ N=\frac{6}{0.15}=40 \end{gathered}[/tex]The answer is 40