33.23% is the change from 623 to 830
Calculation steps:
[( 830 - 623 ) ÷ 623] x 100 = 33.23%
Formula
Percentage change = [(830 - 623) / 623] x 100
Subtract the new number by the original number
830 - 623 = 207
207 ÷ 623 = 0.33226324237560195
0.33226324237560195 x 100 = 33.23%