The median is the middle value in a set of numbers when they are arranged in order. It is the average of the two middle values if there are an even number of numbers in the set.

Here are the steps to find the median:

1. Arrange the numbers in order.
2. If there is an even number of numbers in the set, find the average of the two middle values.
3. If there is an odd number of numbers in the set, the median is the middle value.

For example, if the set of numbers is 1, 3, 5, 7, 9, the median is 5.