According to a candy company, packages of a certain candy contain 21% orange candies. Find the approximate probability that the random sample of 300 candies will contain 25% or more orange candies.

Using normal approximation, what is the probability that at least 25% of 300 randomly sampled candies will be orange?

Can anyone explain to me in detail how to find the answer to this question. I need it as soon as possible. Thank you