2109.68% is the change from 31 to 685
Calculation steps:
[( 685 - 31 ) ÷ 31] x 100 = 2109.68%
Formula
Percentage change = [(685 - 31) / 31] x 100
Subtract the new number by the original number
685 - 31 = 654
654 ÷ 31 = 21.096774193548388
21.096774193548388 x 100 = 2109.68%