11/8÷(7/6-5/9)=11/8÷(21/18-10/18)=11/8÷11/18=11/8x18/11=9/4
11/8 ÷(7/6-5/9)=11/8 ÷(21/18-10/18)=11/8 ÷11/18=11/8x18/11=9/4