4173.33% is the change from 15 to 641
Calculation steps:
[( 641 - 15 ) ÷ 15] x 100 = 4173.33%
Formula
Percentage change = [(641 - 15) / 15] x 100
Subtract the new number by the original number
641 - 15 = 626
626 ÷ 15 = 41.733333333333334
41.733333333333334 x 100 = 4173.33%