-45.79% is the change from 950 to 515
Calculation steps:
[( 515 - 950 ) ÷ 950] x 100 = -45.79%
Formula
Percentage change = [(515 - 950) / 950] x 100
Subtract the new number by the original number
515 - 950 = -435
-435 ÷ 950 = -0.45789473684210524
-0.45789473684210524 x 100 = -45.79%