16/5 * 7/8 = 14/5 or 2 4/5.
8 times 4 is 32, but more to the point here, it is 4 eights. 8 times 5 is 40, but more to the point here, it is 5 eights. Obviously then, 5 eights is 1 eight more than 4 eights. Or 8. (and if you don't believe me, subtract 32 from 40 and see if I was right!)
three eights times 5 = 3*8 times 5 = 24 times 5 = 120
-1 5/8
2 eights and 5 eights
(5/8) * (2/1) = 5/4 = 1 1/4 or 1.25.
7 eights or 56
3 1/4 x 4 1/2 = 14 5/8 or 14 and five eights
1
5/8 + 1/4 is the same as 5/8 + 2/8 = 7/8
6/8 or 3/4
8 1/8