(1 5/11)-2 : (4/11)-2

(1 5/11)-2 : (4/11)-2 = 16/11 - 2 * 11/4 - 2 = 16/11 - 11/2 - 2 = 32/22 - 121/22 - 2 = -89/22 - 2= - 6 1/22

(1 5/11)-2 : (4/11)-2= (-6/11): (-1 7/11)=⅓