2.85% is the change from 808 to 831
Calculation steps:
[( 831 - 808 ) ÷ 808] x 100 = 2.85%
Formula
Percentage change = [(831 - 808) / 808] x 100
Subtract the new number by the original number
831 - 808 = 23
23 ÷ 808 = 0.028465346534653466
0.028465346534653466 x 100 = 2.85%