Finding the angles of a parallelogram. In a parallelogram, one angle is $2/5th$ of the adjacent angles. Determine the angles of the parallelogram.

I tried the following,

Let the adjacent angles be $2x$

Let the other angle be $y$

Accordingly, $y=6/5*2x$

What should I do next? Please help.
In a parallelogram, addition of 2 adjacent angles always produces $\pi$. Can you take it from here?

Also, I think you might have misunderstood the question. If any of the adjacent angles(the angles to the clockwise and the anti-clockwise direction to any angle  $\angle A$ are mutually equal) is x, then the angle in question is 2x/5. 

What you assumed would probably be true if the question read, "In a parallelogram, one angle is 2/5th of the SUM OF adjacent angles. "
Sum of two adjacent angles in a parallelogram is $180^{\circ}$, so you have $$x + \frac{2x}{5} = 180^{\circ}.$$