-42.82% is the change from 850 to 486
Calculation steps:
[( 486 - 850 ) ÷ 850] x 100 = -42.82%
Formula
Percentage change = [(486 - 850) / 850] x 100
Subtract the new number by the original number
486 - 850 = -364
-364 ÷ 850 = -0.42823529411764705
-0.42823529411764705 x 100 = -42.82%