The mixed number would be 1 and 1/2.
Multiply 17(number of students) and 17(amount he’s spending on each student)
So 17x17=289
Then subtract what he used which is 97.41
So 289-97.41= 191.59
He has $191.59 left
28 / 49
divide by 7 at top and bottom
(28/7) / (49/7)
4 / 7