-99.41% is the change from 851 to 5
Calculation steps:
[( 5 - 851 ) ÷ 851] x 100 = -99.41%
Formula
Percentage change = [(5 - 851) / 851] x 100
Subtract the new number by the original number
5 - 851 = -846
-846 ÷ 851 = -0.9941245593419507
-0.9941245593419507 x 100 = -99.41%