-29.12% is the change from 879 to 623
Calculation steps:
[( 623 - 879 ) ÷ 879] x 100 = -29.12%
Formula
Percentage change = [(623 - 879) / 879] x 100
Subtract the new number by the original number
623 - 879 = -256
-256 ÷ 879 = -0.2912400455062571
-0.2912400455062571 x 100 = -29.12%