3/4 = (3*25)/(4*25) = 75/100 = 0,75 в десятичных дробях
4,52 = 452/100
4 5/27 = (4*27+5)/27 = 113/27
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3 3/4 : 0,03 + 4,52 : (-4 5/27) = 123,92
1) 3 3/4 : 0,03 = 3,75 : 0,03 = 125
2) 4,52 : (-4 5/27) = 452/100 : (-113/27) = 452/100 * (-27/113) = - (4*27)/100 = - 108/100 = - 1,08
3) 125 + (-1,08) = 125 - 1,08 = 123,92