-31.27% is the change from 937 to 644
Calculation steps:
[( 644 - 937 ) ÷ 937] x 100 = -31.27%
Formula
Percentage change = [(644 - 937) / 937] x 100
Subtract the new number by the original number
644 - 937 = -293
-293 ÷ 937 = -0.3127001067235859
-0.3127001067235859 x 100 = -31.27%