### Video Transcript

A garden consists of 200
trees. We want to take a sample of 20
trees. Express the sample size chosen
using percentage.

Remember, the sample size is
the number of members in the sample, the subset of the population. In this case, we’re taking a
sample of 20 trees, so the sample size is 20. The garden consists of 200
trees, so this is the total population size. So we can express the sample
size as a percent of the population by dividing the sample size by the
population size and multiplying by 100. That’s 20 divided by 200 times
100, which is equal to 10. So we’ve expressed the sample
size as a percentage. It’s 10 percent.