Question

7/20-(5/8-2/5)=?
5/6+(5/9-1/4)=?
Помогите, пожалуйста.

Answer 1

7/20 - (5/8-2/5) = 7/20 - (25/40 - 16/40) = 14/40 - 9/40 = 5/40 = 1/8
5/6 + (5/9-1/4) = 5/6 + (20/36 - 9/36) = 30/36 + 11/36 = 41/36 = 1  5/36