percent

5.333333333333 just put 5.33

I am fairly certian it is 83.3333333...%

You have to take 15 and divide it by 18 and you will get the answer in decimal form

$\frac{15}{18}=\frac{x}{100}\\~\\ 100*\frac{15}{18}=x \\~\\83\frac13=x$

So...15 is      $83\frac13\%$      of 18...Guest #2 is right