-27.93% is the change from 870 to 627
Calculation steps:
[( 627 - 870 ) ÷ 870] x 100 = -27.93%
Formula
Percentage change = [(627 - 870) / 870] x 100
Subtract the new number by the original number
627 - 870 = -243
-243 ÷ 870 = -0.2793103448275862
-0.2793103448275862 x 100 = -27.93%