Question

Calculati :
b) 1 : { 1/3 + 12/13 * [ 1/3 + 1 : ( 1/7 + 1/2 x 2/7 )]}

Answer 1

1:[1/3+12/13*(1/3+1:2/7)]=1:[1/3+12/13*(1/3+7/2)=1:[1/3+12/13*23/36]=
1:[1/3+46/13]=1:[151/39]=39/151