-94.37% is the change from 870 to 49
Calculation steps:
[( 49 - 870 ) ÷ 870] x 100 = -94.37%
Formula
Percentage change = [(49 - 870) / 870] x 100
Subtract the new number by the original number
49 - 870 = -821
-821 ÷ 870 = -0.9436781609195403
-0.9436781609195403 x 100 = -94.37%