-49.94% is the change from 821 to 411
Calculation steps:
[( 411 - 821 ) ÷ 821] x 100 = -49.94%
Formula
Percentage change = [(411 - 821) / 821] x 100
Subtract the new number by the original number
411 - 821 = -410
-410 ÷ 821 = -0.4993909866017052
-0.4993909866017052 x 100 = -49.94%