-68.64% is the change from 861 to 270
Calculation steps:
[( 270 - 861 ) ÷ 861] x 100 = -68.64%
Formula
Percentage change = [(270 - 861) / 861] x 100
Subtract the new number by the original number
270 - 861 = -591
-591 ÷ 861 = -0.686411149825784
-0.686411149825784 x 100 = -68.64%