-29.01% is the change from 879 to 624
Calculation steps:
[( 624 - 879 ) ÷ 879] x 100 = -29.01%
Formula
Percentage change = [(624 - 879) / 879] x 100
Subtract the new number by the original number
624 - 879 = -255
-255 ÷ 879 = -0.2901023890784983
-0.2901023890784983 x 100 = -29.01%