HAHAHHAH, WOW. Ok, just for you, because I feel bad for you, I'm going to help. Here's a quick lesson on the CORRECT way to calculate the percentage difference in two lengths. I suggest you read this to help avoid looking ignorant and uneducated in the future.
If you compare the length of two things, the smaller is measured as a percentage of the larger. To help you understand this, I will try to make it as simple as possible:
Jump B is 50 ft in length.
Jump K is 40 ft. in length.
1. You take the length of the short and divide it by the length of the longer.
-- Here you take B (40) and divide by K (50). So, 40/50= .80 or 80%
2. You then subtract the value from 100%. This gives you the percentage difference from K to B.
** So, 100%- 80% = 20%. That is what the percentage difference in length from B to K.
Thus, Jump K is 20% smaller than jump B. I hope this helps you to better understand how to compare the percentage difference in size between two jumps. Perhaps it will even save you from making future accusatory and ignorant statements that reflect poorly on your image.
LINK2: http://answers.yahoo.com/question/index?qid=20060627223156AAcbsXS