-22.18% is the change from 861 to 670
Calculation steps:
[( 670 - 861 ) ÷ 861] x 100 = -22.18%
Formula
Percentage change = [(670 - 861) / 861] x 100
Subtract the new number by the original number
670 - 861 = -191
-191 ÷ 861 = -0.2218350754936121
-0.2218350754936121 x 100 = -22.18%