65.19% is the change from 497 to 821
Calculation steps:
[( 821 - 497 ) ÷ 497] x 100 = 65.19%
Formula
Percentage change = [(821 - 497) / 497] x 100
Subtract the new number by the original number
821 - 497 = 324
324 ÷ 497 = 0.6519114688128773
0.6519114688128773 x 100 = 65.19%