-75.95% is the change from 819 to 197
Calculation steps:
[( 197 - 819 ) ÷ 819] x 100 = -75.95%
Formula
Percentage change = [(197 - 819) / 819] x 100
Subtract the new number by the original number
197 - 819 = -622
-622 ÷ 819 = -0.7594627594627594
-0.7594627594627594 x 100 = -75.95%