It should be the same, 25%. Let's say Josh makes $4,000 a year, and Jeff makes $5,000. Jeff makes 25% more than Josh, and Josh makes 25% less than Jeff. Hope this helped.
I do not know the values of the numbers so I cannot give u a direct answer.
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21
Q1 (quartile 1) = take the 5th and 6th number and divide it by 2
Q2 (quartile 2, median) = the 11th number
Q3 (quartile 3) = take the 16th and 17th number and divide it by 2
It's very simple: It's the surface of a base times the height
