c/d = (2*5) / (3*7) = 10/21. ac/bd = (a/b) * (c/d) = (5/7) * (10/21) = 50 / 147.
c/d = (2*5) / (3*7) = 10/21। ac/bd = (a/b) * (c/d) = (5/7) * (10/21) = 50 / 147।