-51.65% is the change from 850 to 411
Calculation steps:
[( 411 - 850 ) ÷ 850] x 100 = -51.65%
Formula
Percentage change = [(411 - 850) / 850] x 100
Subtract the new number by the original number
411 - 850 = -439
-439 ÷ 850 = -0.5164705882352941
-0.5164705882352941 x 100 = -51.65%