Answer
$y = 112$
Work Step by Step
In a parallelogram, an angle must be supplementary to its two consecutive sides. If we subtract the measure of the consecutive angle from $180^{\circ}$, then we can find the measure of the unknown angle:
$m \angle P = 180 - m \angle L$
Let's plug in what we know:
$y = 180 - 68$
Subtract to solve:
$y = 112$
