-36.12% is the change from 850 to 543
Calculation steps:
[( 543 - 850 ) ÷ 850] x 100 = -36.12%
Formula
Percentage change = [(543 - 850) / 850] x 100
Subtract the new number by the original number
543 - 850 = -307
-307 ÷ 850 = -0.3611764705882353
-0.3611764705882353 x 100 = -36.12%