-37.06% is the change from 850 to 535
Calculation steps:
[( 535 - 850 ) ÷ 850] x 100 = -37.06%
Formula
Percentage change = [(535 - 850) / 850] x 100
Subtract the new number by the original number
535 - 850 = -315
-315 ÷ 850 = -0.37058823529411766
-0.37058823529411766 x 100 = -37.06%