-99.63% is the change from 819 to 3
Calculation steps:
[( 3 - 819 ) ÷ 819] x 100 = -99.63%
Formula
Percentage change = [(3 - 819) / 819] x 100
Subtract the new number by the original number
3 - 819 = -816
-816 ÷ 819 = -0.9963369963369964
-0.9963369963369964 x 100 = -99.63%