SSC CPO SI and ASI Model Paper 10

Mahesh, Suresh and Rupesh had dinner at a restaurant. The entire amount of bill was split in three parts. Mahesh paid $\frac{1}{{3_{}^{\mathit{r}}}_{}^{\mathit{d}}}$ of the total amount. Suresh paid $\frac{7}{{{15}_{}^{\mathit{t}}}_{}^{\mathit{h}}}$ of the amount paid by Mahesh. The rest of the amount was paid by Rupesh. Find out the fraction of the bill paid by Rupesh.