Respuesta :

4/5 of the share belongs to Helen and Sylvia
Difference in total share is= 4/5-1/5
                                          =3/5
So 3/5=12+3
          =15
3 units is 15
Thus 1 unit is 15/3 which is 5
And 5 units is 25(5*5)
I am not too sure though
Sorry