Answer
The student incorrectly added the whole numbers and did not simplify the final fraction.
Work Step by Step
For starters, the student found that 78 plus 26 was 94, but this is actual 104. Also, the student left the fraction as $94\frac{31}{20}$. However, the fraction should not be left as greater than 1 but instead should have been simplified to $95\frac{11}{20}$.
