31.38% is the change from 631 to 829
Calculation steps:
[( 829 - 631 ) ÷ 631] x 100 = 31.38%
Formula
Percentage change = [(829 - 631) / 631] x 100
Subtract the new number by the original number
829 - 631 = 198
198 ÷ 631 = 0.31378763866877973
0.31378763866877973 x 100 = 31.38%