-52.47% is the change from 850 to 404
Calculation steps:
[( 404 - 850 ) ÷ 850] x 100 = -52.47%
Formula
Percentage change = [(404 - 850) / 850] x 100
Subtract the new number by the original number
404 - 850 = -446
-446 ÷ 850 = -0.5247058823529411
-0.5247058823529411 x 100 = -52.47%