Answer
$\dfrac{14}{25}=56\%$
Work Step by Step
You have to find the total number of blocks by adding the given colored blocks: $36+48+22+19=125$.
You have $125$ colored blocks and have to find the probability of picking a green or yellow block.
So add $48$ and $22$ to get $70$ which is the number of blocks that are either green or yellow:
$P(G or Y)=\dfrac{\text{number of green or yellowe blocks}}{\text{total number of blocks}}$
$P(G or Y)=\dfrac{70}{125}=\dfrac{14}{25}=56\%$
