28.34% is the change from 501 to 643
Calculation steps:
[( 643 - 501 ) ÷ 501] x 100 = 28.34%
Formula
Percentage change = [(643 - 501) / 501] x 100
Subtract the new number by the original number
643 - 501 = 142
142 ÷ 501 = 0.2834331337325349
0.2834331337325349 x 100 = 28.34%