-54.24% is the change from 850 to 389
Calculation steps:
[( 389 - 850 ) ÷ 850] x 100 = -54.24%
Formula
Percentage change = [(389 - 850) / 850] x 100
Subtract the new number by the original number
389 - 850 = -461
-461 ÷ 850 = -0.5423529411764706
-0.5423529411764706 x 100 = -54.24%