-97.13% is the change from 870 to 25
Calculation steps:
[( 25 - 870 ) ÷ 870] x 100 = -97.13%
Formula
Percentage change = [(25 - 870) / 870] x 100
Subtract the new number by the original number
25 - 870 = -845
-845 ÷ 870 = -0.9712643678160919
-0.9712643678160919 x 100 = -97.13%