29.86% is the change from 623 to 809
Calculation steps:
[( 809 - 623 ) ÷ 623] x 100 = 29.86%
Formula
Percentage change = [(809 - 623) / 623] x 100
Subtract the new number by the original number
809 - 623 = 186
186 ÷ 623 = 0.2985553772070626
0.2985553772070626 x 100 = 29.86%