-32.21% is the change from 950 to 644
Calculation steps:
[( 644 - 950 ) ÷ 950] x 100 = -32.21%
Formula
Percentage change = [(644 - 950) / 950] x 100
Subtract the new number by the original number
644 - 950 = -306
-306 ÷ 950 = -0.32210526315789473
-0.32210526315789473 x 100 = -32.21%