-15.79% is the change from 950 to 800
Calculation steps:
[( 800 - 950 ) ÷ 950] x 100 = -15.79%
Formula
Percentage change = [(800 - 950) / 950] x 100
Subtract the new number by the original number
800 - 950 = -150
-150 ÷ 950 = -0.15789473684210525
-0.15789473684210525 x 100 = -15.79%