-28.88% is the change from 928 to 660
Calculation steps:
[( 660 - 928 ) ÷ 928] x 100 = -28.88%
Formula
Percentage change = [(660 - 928) / 928] x 100
Subtract the new number by the original number
660 - 928 = -268
-268 ÷ 928 = -0.28879310344827586
-0.28879310344827586 x 100 = -28.88%