Найдите значение выражения: (2/3+1/12+5/24): 12

2/3=6
1/12=12
5/24=120
6+12+120=138
138:2=69

1) 2/3 + 1/12 = 4*2/4*3+1*1/1*12 = 8/12+1/12 = 8+1/12 = 9/12 = 3/4
2) 3/4 + 5/24 = 6*3/6*4+1*5/1*24 = 18/24+5/24 = 18+5/24 = 23/24
3) 23/24:12 = 23/24*1/12 = 23*1/24*12 = 23/288