409.94% is the change from 161 to 821
Calculation steps:
[( 821 - 161 ) ÷ 161] x 100 = 409.94%
Formula
Percentage change = [(821 - 161) / 161] x 100
Subtract the new number by the original number
821 - 161 = 660
660 ÷ 161 = 4.099378881987578
4.099378881987578 x 100 = 409.94%