-32% is the change from 950 to 646
Calculation steps:
[( 646 - 950 ) ÷ 950] x 100 = -32%
Formula
Percentage change = [(646 - 950) / 950] x 100
Subtract the new number by the original number
646 - 950 = -304
-304 ÷ 950 = -0.32
-0.32 x 100 = -32%
Example