-89.47% is the change from 950 to 100
Calculation steps:
[( 100 - 950 ) ÷ 950] x 100 = -89.47%
Formula
Percentage change = [(100 - 950) / 950] x 100
Subtract the new number by the original number
100 - 950 = -850
-850 ÷ 950 = -0.8947368421052632
-0.8947368421052632 x 100 = -89.47%