30.58% is the change from 641 to 837
Calculation steps:
[( 837 - 641 ) ÷ 641] x 100 = 30.58%
Formula
Percentage change = [(837 - 641) / 641] x 100
Subtract the new number by the original number
837 - 641 = 196
196 ÷ 641 = 0.30577223088923555
0.30577223088923555 x 100 = 30.58%