-55.52% is the change from 870 to 387
Calculation steps:
[( 387 - 870 ) ÷ 870] x 100 = -55.52%
Formula
Percentage change = [(387 - 870) / 870] x 100
Subtract the new number by the original number
387 - 870 = -483
-483 ÷ 870 = -0.5551724137931034
-0.5551724137931034 x 100 = -55.52%