-87.3% is the change from 819 to 104
Calculation steps:
[( 104 - 819 ) ÷ 819] x 100 = -87.3%
Formula
Percentage change = [(104 - 819) / 819] x 100
Subtract the new number by the original number
104 - 819 = -715
-715 ÷ 819 = -0.873015873015873
-0.873015873015873 x 100 = -87.3%