-36.71% is the change from 850 to 538
Calculation steps:
[( 538 - 850 ) ÷ 850] x 100 = -36.71%
Formula
Percentage change = [(538 - 850) / 850] x 100
Subtract the new number by the original number
538 - 850 = -312
-312 ÷ 850 = -0.36705882352941177
-0.36705882352941177 x 100 = -36.71%