Q .Solve ( 6 / 9) * (4 / 9) / (6 / 8) / (4 / 6) = ?

Lets convert divison in to multiplication-

= ( 6 / 9) * (4 / 9) * (8 / 6) * (6 / 4)

Now solve the equation -

= 0.59259259259259

? = 0.59259259259259