41.68% is the change from 643 to 911
Calculation steps:
[( 911 - 643 ) ÷ 643] x 100 = 41.68%
Formula
Percentage change = [(911 - 643) / 643] x 100
Subtract the new number by the original number
911 - 643 = 268
268 ÷ 643 = 0.416796267496112
0.416796267496112 x 100 = 41.68%