-50% is the change from 822 to 411
Calculation steps:
[( 411 - 822 ) ÷ 822] x 100 = -50%
Formula
Percentage change = [(411 - 822) / 822] x 100
Subtract the new number by the original number
411 - 822 = -411
-411 ÷ 822 = -0.5
-0.5 x 100 = -50%
Example