-27.87% is the change from 879 to 634
Calculation steps:
[( 634 - 879 ) ÷ 879] x 100 = -27.87%
Formula
Percentage change = [(634 - 879) / 879] x 100
Subtract the new number by the original number
634 - 879 = -245
-245 ÷ 879 = -0.2787258248009101
-0.2787258248009101 x 100 = -27.87%