-75.56% is the change from 855 to 209
Calculation steps:
[( 209 - 855 ) ÷ 855] x 100 = -75.56%
Formula
Percentage change = [(209 - 855) / 855] x 100
Subtract the new number by the original number
209 - 855 = -646
-646 ÷ 855 = -0.7555555555555555
-0.7555555555555555 x 100 = -75.56%