Final answer:
The median of the given data set is 3.875.
Step-by-step explanation:
The median is the middle value in a set of data when it is arranged in ascending order. To find the median, first arrange the numbers in ascending order: 0.39, 3 and 7/8, 4.65, 31/10, 79%, 254%. The middle value will be the median. If there is an odd number of data values, the middle value will be the median. If there is an even number of data values, the median will be the average of the two middle values.
In this case, there are six data values, so we will take the average of the third and fourth values to find the median. The third value is 4.65 and the fourth value is 31/10, which can be calculated as 3.1. So, the median is (4.65 + 3.1) / 2 = 7.75 / 2 = 3.875.