63.87% is the change from 501 to 821
Calculation steps:
[( 821 - 501 ) ÷ 501] x 100 = 63.87%
Formula
Percentage change = [(821 - 501) / 501] x 100
Subtract the new number by the original number
821 - 501 = 320
320 ÷ 501 = 0.6387225548902196
0.6387225548902196 x 100 = 63.87%