-89.89% is the change from 870 to 88
Calculation steps:
[( 88 - 870 ) ÷ 870] x 100 = -89.89%
Formula
Percentage change = [(88 - 870) / 870] x 100
Subtract the new number by the original number
88 - 870 = -782
-782 ÷ 870 = -0.8988505747126436
-0.8988505747126436 x 100 = -89.89%