-28.28% is the change from 870 to 624
Calculation steps:
[( 624 - 870 ) ÷ 870] x 100 = -28.28%
Formula
Percentage change = [(624 - 870) / 870] x 100
Subtract the new number by the original number
624 - 870 = -246
-246 ÷ 870 = -0.2827586206896552
-0.2827586206896552 x 100 = -28.28%