-89.43% is the change from 870 to 92
Calculation steps:
[( 92 - 870 ) ÷ 870] x 100 = -89.43%
Formula
Percentage change = [(92 - 870) / 870] x 100
Subtract the new number by the original number
92 - 870 = -778
-778 ÷ 870 = -0.8942528735632184
-0.8942528735632184 x 100 = -89.43%