5/9-0.375+11/18-5/8 30÷(5/7+15/8) 3÷3/7-3/7÷3
=(5/9+11/18)-(5/8+0.375) =30÷ 145/56 =7-1/7
=7/6-1 =336/29 =48/7
=1/6