-78.18% is the change from 866 to 189
Calculation steps:
[( 189 - 866 ) ÷ 866] x 100 = -78.18%
Formula
Percentage change = [(189 - 866) / 866] x 100
Subtract the new number by the original number
189 - 866 = -677
-677 ÷ 866 = -0.7817551963048499
-0.7817551963048499 x 100 = -78.18%