In order to find the percent yield of a reaction, we need to use the following formula:
%yield = (actual yield/theoretical yield)*100
The actual yield is 7.59 grams
The theoretical yield is the mass you found on letter C, 8.0 grams
Now we can use the formula:
%yield = (7.59/8)100
%yield = 0.9487 * 100
The percent yield will be 94.87 %