[[Ivanzinho]]

Prueba con esto :

Código SQL [-]
Select E.lote, Sum(E.kgs), T.articulo,Sum(T.kgs), Sum(T.kgs)/Sum(E.kgs) as Rdto
from Tentradas as E, Ttransformaciones as T
Where E.lote = T.lote
Group By E.lote, T.articulo