6,93:(0,028+0,36*9,2)-3,5

1. 0,36*9,2 = 3,312 2. 0,028+3,312 = 3,34 3. 6,93/3,34  = 693/334 4. 693/334 - 35/10 =(639*5 - 167*36)/1670 = (3195-6012)/1670 = -2817/1670