-36.35% is the change from 850 to 541
Calculation steps:
[( 541 - 850 ) ÷ 850] x 100 = -36.35%
Formula
Percentage change = [(541 - 850) / 850] x 100
Subtract the new number by the original number
541 - 850 = -309
-309 ÷ 850 = -0.3635294117647059
-0.3635294117647059 x 100 = -36.35%