-30.38% is the change from 879 to 612
Calculation steps:
[( 612 - 879 ) ÷ 879] x 100 = -30.38%
Formula
Percentage change = [(612 - 879) / 879] x 100
Subtract the new number by the original number
612 - 879 = -267
-267 ÷ 879 = -0.3037542662116041
-0.3037542662116041 x 100 = -30.38%