Verified Answer :

substitute the value of c in the equation;
\(\frac{7}{8} * \frac{8}{1}\) cross simplify and your new fractions are;

\(\frac{7}{1} * \frac{1}{1}\) = 
7 × 1 = 7
1 × 1 = 1 
So your final answer is 7/1 or simply just 7