(11,1÷3- 2целых1/6 )÷ 1целых2/21 /( 3целых 5/6+ 1,5)×3/4

[(11,1 : 3 - 2 1/6) : 1 2/21] / [3 5/6 + 1,5) * 3,4] = 0,35

1) 11,1 : 3 = 3,7 = 3 7/10
2) 3 7/10 - 2 1/6 = 3 21/30 - 2 5/30 = 1 16/30 = 1 8/15 = 23/15
3) 23/15 : 1 2/21 = 23/15 : 23/21 = 23/15 * 21/23 = 21/15 = 1 6/15 = 1 2/5 = 1,4
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4) 3 5/6 + 1,5 = 3 5/6 + 1 1/2 = 3 5/6 + 1 3/6 = 4 8/6 = 5 2/6 = 5 1/3 = 16/3
5) 16/3 * 3/4 = 16/4 = 4
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6) 1,4 : 4 = 0,35