41.81% is the change from 641 to 909
Calculation steps:
[( 909 - 641 ) ÷ 641] x 100 = 41.81%
Formula
Percentage change = [(909 - 641) / 641] x 100
Subtract the new number by the original number
909 - 641 = 268
268 ÷ 641 = 0.41809672386895474
0.41809672386895474 x 100 = 41.81%