28.51% is the change from 491 to 631
Calculation steps:
[( 631 - 491 ) ÷ 491] x 100 = 28.51%
Formula
Percentage change = [(631 - 491) / 491] x 100
Subtract the new number by the original number
631 - 491 = 140
140 ÷ 491 = 0.285132382892057
0.285132382892057 x 100 = 28.51%