-28.51% is the change from 870 to 622
Calculation steps:
[( 622 - 870 ) ÷ 870] x 100 = -28.51%
Formula
Percentage change = [(622 - 870) / 870] x 100
Subtract the new number by the original number
622 - 870 = -248
-248 ÷ 870 = -0.2850574712643678
-0.2850574712643678 x 100 = -28.51%