-67.6% is the change from 861 to 279
Calculation steps:
[( 279 - 861 ) ÷ 861] x 100 = -67.6%
Formula
Percentage change = [(279 - 861) / 861] x 100
Subtract the new number by the original number
279 - 861 = -582
-582 ÷ 861 = -0.6759581881533101
-0.6759581881533101 x 100 = -67.6%