[evanisthat!]

Originally Posted by Nate Laverdure

I would estimate that the height of a story, from floor to floor, is 18 feet, assuming that the kid in the black shirt is approximately 6 feet tall. This makes the total height to the floor of the 3rd floor equal to 2*18 = 36 ft. Since the kid's arms are outstretched, I would assume that he dropped the ball from about shoulder-height, which would put the bottom of the ball at approximately 2 ft above the 3rd floor. Total height = 38 ft.

According to the post, the ball bounced to a height of 17 ft. This means that "bounce percentage" would equal 17/38 * 100 % = 44.7%.

Your estimations seem right, but don't you have to convert the inches to feet or the feet to inches in order to get an accurate percent? 17/(38*12)*100% = 3.72%? Correct me if I am wrong...