31.97% is the change from 613 to 809
Calculation steps:
[( 809 - 613 ) ÷ 613] x 100 = 31.97%
Formula
Percentage change = [(809 - 613) / 613] x 100
Subtract the new number by the original number
809 - 613 = 196
196 ÷ 613 = 0.3197389885807504
0.3197389885807504 x 100 = 31.97%