-19.18% is the change from 850 to 687
Calculation steps:
[( 687 - 850 ) ÷ 850] x 100 = -19.18%
Formula
Percentage change = [(687 - 850) / 850] x 100
Subtract the new number by the original number
687 - 850 = -163
-163 ÷ 850 = -0.19176470588235295
-0.19176470588235295 x 100 = -19.18%