-2.73% is the change from 880 to 856
Calculation steps:
[( 856 - 880 ) ÷ 880] x 100 = -2.73%
Formula
Percentage change = [(856 - 880) / 880] x 100
Subtract the new number by the original number
856 - 880 = -24
-24 ÷ 880 = -0.02727272727272727
-0.02727272727272727 x 100 = -2.73%