Answer:
60th percentile.
Step-by-step explanation:
When a value V is said to be in the xth percentile of a set, x% of the values in the set are lower than V and (100-x)% of the values in the set are higher than V.
In this problem, we have that:
300 observations, there are 180 points less than 81.2.
180/300 = 0.6
So 60% of the observation are lower than 81.2, which means that 81.2 is the 60th percentile.