-78.29% is the change from 866 to 188
Calculation steps:
[( 188 - 866 ) ÷ 866] x 100 = -78.29%
Formula
Percentage change = [(188 - 866) / 866] x 100
Subtract the new number by the original number
188 - 866 = -678
-678 ÷ 866 = -0.7829099307159353
-0.7829099307159353 x 100 = -78.29%