(7/12 + 2 5/6) x (1 1/5 – 7/10)

(7/12 + 17/6) x (6/5 – 7/10) =
(7/12 + 34/12) x ( 12/10 – 7/10)=
41/12 x 5/10 = 41/12 x 1/2 = 41/24 = 1 17/24