Answers

2015-05-25T11:41:13+05:30
6*8/7 & 6/7*1/8
48/7 & 3/28 
48/7 - 3/28 =189/28
6/7/8/= 6/7/8.

The difference is then,
48/7-3/28= (48/7 ) (4/4) - 3/28 <--- Use the common denominator 
48/7-3/28 = 192/28 - 3/28
48/7- 3/28 = 189/28
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❌❎wrong it's not in the options