31.46% is the change from 623 to 819
Calculation steps:
[( 819 - 623 ) ÷ 623] x 100 = 31.46%
Formula
Percentage change = [(819 - 623) / 623] x 100
Subtract the new number by the original number
819 - 623 = 196
196 ÷ 623 = 0.3146067415730337
0.3146067415730337 x 100 = 31.46%