-27.63% is the change from 912 to 660
Calculation steps:
[( 660 - 912 ) ÷ 912] x 100 = -27.63%
Formula
Percentage change = [(660 - 912) / 912] x 100
Subtract the new number by the original number
660 - 912 = -252
-252 ÷ 912 = -0.27631578947368424
-0.27631578947368424 x 100 = -27.63%