-30.53% is the change from 927 to 644
Calculation steps:
[( 644 - 927 ) ÷ 927] x 100 = -30.53%
Formula
Percentage change = [(644 - 927) / 927] x 100
Subtract the new number by the original number
644 - 927 = -283
-283 ÷ 927 = -0.30528586839266453
-0.30528586839266453 x 100 = -30.53%