2687.1% is the change from 31 to 864
Calculation steps:
[( 864 - 31 ) ÷ 31] x 100 = 2687.1%
Formula
Percentage change = [(864 - 31) / 31] x 100
Subtract the new number by the original number
864 - 31 = 833
833 ÷ 31 = 26.870967741935484
26.870967741935484 x 100 = 2687.1%