-29.2% is the change from 870 to 616
Calculation steps:
[( 616 - 870 ) ÷ 870] x 100 = -29.2%
Formula
Percentage change = [(616 - 870) / 870] x 100
Subtract the new number by the original number
616 - 870 = -254
-254 ÷ 870 = -0.29195402298850576
-0.29195402298850576 x 100 = -29.2%