30.98% is the change from 623 to 816
Calculation steps:
[( 816 - 623 ) ÷ 623] x 100 = 30.98%
Formula
Percentage change = [(816 - 623) / 623] x 100
Subtract the new number by the original number
816 - 623 = 193
193 ÷ 623 = 0.3097913322632424
0.3097913322632424 x 100 = 30.98%