-97.92% is the change from 819 to 17
Calculation steps:
[( 17 - 819 ) ÷ 819] x 100 = -97.92%
Formula
Percentage change = [(17 - 819) / 819] x 100
Subtract the new number by the original number
17 - 819 = -802
-802 ÷ 819 = -0.9792429792429792
-0.9792429792429792 x 100 = -97.92%