2129.03% is the change from 31 to 691
Calculation steps:
[( 691 - 31 ) ÷ 31] x 100 = 2129.03%
Formula
Percentage change = [(691 - 31) / 31] x 100
Subtract the new number by the original number
691 - 31 = 660
660 ÷ 31 = 21.29032258064516
21.29032258064516 x 100 = 2129.03%