102.22% is the change from 406 to 821
Calculation steps:
[( 821 - 406 ) ÷ 406] x 100 = 102.22%
Formula
Percentage change = [(821 - 406) / 406] x 100
Subtract the new number by the original number
821 - 406 = 415
415 ÷ 406 = 1.022167487684729
1.022167487684729 x 100 = 102.22%