-13.79% is the change from 950 to 819
Calculation steps:
[( 819 - 950 ) ÷ 950] x 100 = -13.79%
Formula
Percentage change = [(819 - 950) / 950] x 100
Subtract the new number by the original number
819 - 950 = -131
-131 ÷ 950 = -0.13789473684210526
-0.13789473684210526 x 100 = -13.79%