1) 8 7/12 - 5 19/36 = 8 21/36 - 5 19/36 = 3 2/36 = 3 1/18
2) 3 1/18 • 1 4/5 = 55/18 • 9/5 = 11/2
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3) 39,375 - 5 5/8 = 39,375 - 5,625 = 33,75
4) 33,75 : 2 5/11 = 33 3/4 : 2 5/11 = 135/4 : 27/11 = 55/4
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5) 11/2 : 55/4 = 2/5 = 0,4 = 40 ( % )
Ответ 40 %