(13 2\5 - 11 челых 2 десятых : 9 1\3) * 5\12

 ( 13 2\5 - 11 ,2 : 9 1\3) * 5\12=2 13/24
1)11 2/10:9 1/3=112/10*3/28=12/10=1,2
2)13 2/5-1,2=13,4-1,2=12,2
3)12,2*5/12=122/10*5/12=61/24=2 13/24

(13 2/5 - 11,2 : 9 1/3) * 5/12 = 5 1/12
1) 11 1/5 : 9 1/3 = 56/5 * 3/28 = 2/5 * 3/1 = 6/5 = 1 1/5
2) 13,4 - 1,2 = 12,2 = 12 1/5
3) 12 1/5 * 5/12 = 61/5 * 5/12 = 61/12 = 5 1/12