-89.38% is the change from 819 to 87
Calculation steps:
[( 87 - 819 ) ÷ 819] x 100 = -89.38%
Formula
Percentage change = [(87 - 819) / 819] x 100
Subtract the new number by the original number
87 - 819 = -732
-732 ÷ 819 = -0.8937728937728938
-0.8937728937728938 x 100 = -89.38%