648.35% is the change from 91 to 681
Calculation steps:
[( 681 - 91 ) ÷ 91] x 100 = 648.35%
Formula
Percentage change = [(681 - 91) / 91] x 100
Subtract the new number by the original number
681 - 91 = 590
590 ÷ 91 = 6.483516483516484
6.483516483516484 x 100 = 648.35%