63.55% is the change from 502 to 821
Calculation steps:
[( 821 - 502 ) ÷ 502] x 100 = 63.55%
Formula
Percentage change = [(821 - 502) / 502] x 100
Subtract the new number by the original number
821 - 502 = 319
319 ÷ 502 = 0.6354581673306773
0.6354581673306773 x 100 = 63.55%