-5.26% is the change from 950 to 900
Calculation steps:
[( 900 - 950 ) ÷ 950] x 100 = -5.26%
Formula
Percentage change = [(900 - 950) / 950] x 100
Subtract the new number by the original number
900 - 950 = -50
-50 ÷ 950 = -0.05263157894736842
-0.05263157894736842 x 100 = -5.26%