Answer:
![(43)/(8\\)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/46nyu690qilc3hfrpyubdhir8w0taywxcn.png)
Explanation:
Since there are 8 slices in each of the 5 boxes, we will multiply. 8 x 5 = 40
So there are 40 slices of pizza from the delivery. And because there are 3 extra slices from the night before in fridge, add those. 40 + 3 = 43.
8 will be the denominator because it is the common number of slices in a box of pizza, 43 will be the numerator to make the improper fraction.
So the amount of pizza as an improper fraction is
![(43)/(8\\)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/46nyu690qilc3hfrpyubdhir8w0taywxcn.png)