-77.05% is the change from 819 to 188
Calculation steps:
[( 188 - 819 ) ÷ 819] x 100 = -77.05%
Formula
Percentage change = [(188 - 819) / 819] x 100
Subtract the new number by the original number
188 - 819 = -631
-631 ÷ 819 = -0.7704517704517705
-0.7704517704517705 x 100 = -77.05%