-30.6% is the change from 879 to 610
Calculation steps:
[( 610 - 879 ) ÷ 879] x 100 = -30.6%
Formula
Percentage change = [(610 - 879) / 879] x 100
Subtract the new number by the original number
610 - 879 = -269
-269 ÷ 879 = -0.30602957906712175
-0.30602957906712175 x 100 = -30.6%