65.67% is the change from 501 to 830
Calculation steps:
[( 830 - 501 ) ÷ 501] x 100 = 65.67%
Formula
Percentage change = [(830 - 501) / 501] x 100
Subtract the new number by the original number
830 - 501 = 329
329 ÷ 501 = 0.656686626746507
0.656686626746507 x 100 = 65.67%