43.68% is the change from 641 to 921
Calculation steps:
[( 921 - 641 ) ÷ 641] x 100 = 43.68%
Formula
Percentage change = [(921 - 641) / 641] x 100
Subtract the new number by the original number
921 - 641 = 280
280 ÷ 641 = 0.43681747269890797
0.43681747269890797 x 100 = 43.68%