-97.19% is the change from 819 to 23
Calculation steps:
[( 23 - 819 ) ÷ 819] x 100 = -97.19%
Formula
Percentage change = [(23 - 819) / 819] x 100
Subtract the new number by the original number
23 - 819 = -796
-796 ÷ 819 = -0.9719169719169719
-0.9719169719169719 x 100 = -97.19%