6977.78% is the change from 9 to 637
Calculation steps:
[( 637 - 9 ) ÷ 9] x 100 = 6977.78%
Formula
Percentage change = [(637 - 9) / 9] x 100
Subtract the new number by the original number
637 - 9 = 628
628 ÷ 9 = 69.77777777777777
69.77777777777777 x 100 = 6977.78%