-90.6% is the change from 819 to 77
Calculation steps:
[( 77 - 819 ) ÷ 819] x 100 = -90.6%
Formula
Percentage change = [(77 - 819) / 819] x 100
Subtract the new number by the original number
77 - 819 = -742
-742 ÷ 819 = -0.905982905982906
-0.905982905982906 x 100 = -90.6%