-3.089285714

Question

-
`(12)/(7)`-
`(11)/(8)`

Answer 1

LCD( lowest common denominator is 56)

`- (12 * 8)/(7 * 8) - (11 * 7)/(8 * 7) \\ = - (96)/(56) - (77)/(56) \\ = - ( 173)/(56)`

ATTACHED IS THE SOLUTION