-47.37% is the change from 950 to 500
Calculation steps:
[( 500 - 950 ) ÷ 950] x 100 = -47.37%
Formula
Percentage change = [(500 - 950) / 950] x 100
Subtract the new number by the original number
500 - 950 = -450
-450 ÷ 950 = -0.47368421052631576
-0.47368421052631576 x 100 = -47.37%