1.  Which of the following fraction is the largest ?
A. 7/8
B. 13/16
C. 31/40
D. 63/80

Answer: Option A

Explanation:

L.C.M. of 8, 16, 40 and 80 = 80.

7 = 70 ;   13 = 65 ;   31 = 62
8 80 16 80 40 80

Since, 70 > 65 > 63 > 62
80 80 80 80

 so 7 > 13 > 63 > 31
8 16 80 40

So, 7 is the largest.
8