-78.41% is the change from 866 to 187
Calculation steps:
[( 187 - 866 ) ÷ 866] x 100 = -78.41%
Formula
Percentage change = [(187 - 866) / 866] x 100
Subtract the new number by the original number
187 - 866 = -679
-679 ÷ 866 = -0.7840646651270208
-0.7840646651270208 x 100 = -78.41%