1) 8 1/2-3 4/13= 17/2-43/13=442/26-86/26=356/26
2) 356/26-17/30=10680/780-442/780=10238/780=11 98/780=11 49/390
1) 8 1/2-3 4/13= 17/2-43/13=442/26-86/26=356/26
2) 356/26-17/30=10680/780-442/780=10238/780=11 98/780=11 49/390