13 целых 2/5-11,2:9целых 1/3

Question

13 целых 2/5-11,2:9целых 1/3

Answer 1

13 2/5 - 11.2 : 9 1/3 
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1) 11.2 : 9 1/3 = 11 1/5 : 9 1/3 = 56/5 : 28/3 = 6/5 = 1.2 
2) 13 2/5 - 1.2 = 13.4 - 1.2 = 12.2
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Ответ 12.2