28.54% is the change from 501 to 644
Calculation steps:
[( 644 - 501 ) ÷ 501] x 100 = 28.54%
Formula
Percentage change = [(644 - 501) / 501] x 100
Subtract the new number by the original number
644 - 501 = 143
143 ÷ 501 = 0.28542914171656686
0.28542914171656686 x 100 = 28.54%