-87.88% is the change from 850 to 103
Calculation steps:
[( 103 - 850 ) ÷ 850] x 100 = -87.88%
Formula
Percentage change = [(103 - 850) / 850] x 100
Subtract the new number by the original number
103 - 850 = -747
-747 ÷ 850 = -0.8788235294117647
-0.8788235294117647 x 100 = -87.88%