-29.81% is the change from 879 to 617
Calculation steps:
[( 617 - 879 ) ÷ 879] x 100 = -29.81%
Formula
Percentage change = [(617 - 879) / 879] x 100
Subtract the new number by the original number
617 - 879 = -262
-262 ÷ 879 = -0.29806598407281
-0.29806598407281 x 100 = -29.81%