-76.92% is the change from 819 to 189
Calculation steps:
[( 189 - 819 ) ÷ 819] x 100 = -76.92%
Formula
Percentage change = [(189 - 819) / 819] x 100
Subtract the new number by the original number
189 - 819 = -630
-630 ÷ 819 = -0.7692307692307693
-0.7692307692307693 x 100 = -76.92%