-99.77% is the change from 855 to 2
Calculation steps:
[( 2 - 855 ) ÷ 855] x 100 = -99.77%
Formula
Percentage change = [(2 - 855) / 855] x 100
Subtract the new number by the original number
2 - 855 = -853
-853 ÷ 855 = -0.9976608187134502
-0.9976608187134502 x 100 = -99.77%