-31.06% is the change from 940 to 648
Calculation steps:
[( 648 - 940 ) ÷ 940] x 100 = -31.06%
Formula
Percentage change = [(648 - 940) / 940] x 100
Subtract the new number by the original number
648 - 940 = -292
-292 ÷ 940 = -0.31063829787234043
-0.31063829787234043 x 100 = -31.06%