(2 2/3 + 1 1/7)*7/40+17/18: 2 5/6=
3 17/21×7/40= 2/3
2/3+17/18=29/18
29/18÷ 17/6= 232/153
232/153= 1 79/153 = 1.516339869281
(2 2/3 + 1 1/7)*7/40+17/18: 2 5/6=
3 17/21×7/40= 2/3
2/3+17/18=29/18
29/18÷ 17/6= 232/153
232/153= 1 79/153 = 1.516339869281