29.79% is the change from 631 to 819
Calculation steps:
[( 819 - 631 ) ÷ 631] x 100 = 29.79%
Formula
Percentage change = [(819 - 631) / 631] x 100
Subtract the new number by the original number
819 - 631 = 188
188 ÷ 631 = 0.2979397781299525
0.2979397781299525 x 100 = 29.79%