-77.58% is the change from 861 to 193
Calculation steps:
[( 193 - 861 ) ÷ 861] x 100 = -77.58%
Formula
Percentage change = [(193 - 861) / 861] x 100
Subtract the new number by the original number
193 - 861 = -668
-668 ÷ 861 = -0.775842044134727
-0.775842044134727 x 100 = -77.58%