-95.79% is the change from 950 to 40
Calculation steps:
[( 40 - 950 ) ÷ 950] x 100 = -95.79%
Formula
Percentage change = [(40 - 950) / 950] x 100
Subtract the new number by the original number
40 - 950 = -910
-910 ÷ 950 = -0.9578947368421052
-0.9578947368421052 x 100 = -95.79%