39.5 = 40 0.5 = 1 40 + 1 = 41

55.5 = 56 0.5 = 1 56 + 1 = 57

3.5 = 4

Since the original 5 numbers only add up to 95.5, you have a leftover 0.5 to distribute between them. After doing so, you would have what could have been the original results before rounding.