Multiply the sum of 7/8 and 3/4 by the sum of 11/13 and -5/26

According to the question,
= (7/8 + 3/4) x (11/13 + [-5/26])
= (7/8  + 6/8) x (22/26 + [-5/26])
= 13/8 x 17/26
= 17/16