-50.06% is the change from 821 to 410
Calculation steps:
[( 410 - 821 ) ÷ 821] x 100 = -50.06%
Formula
Percentage change = [(410 - 821) / 821] x 100
Subtract the new number by the original number
410 - 821 = -411
-411 ÷ 821 = -0.5006090133982948
-0.5006090133982948 x 100 = -50.06%