-99.76% is the change from 819 to 2
Calculation steps:
[( 2 - 819 ) ÷ 819] x 100 = -99.76%
Formula
Percentage change = [(2 - 819) / 819] x 100
Subtract the new number by the original number
2 - 819 = -817
-817 ÷ 819 = -0.9975579975579976
-0.9975579975579976 x 100 = -99.76%