-27.3% is the change from 912 to 663
Calculation steps:
[( 663 - 912 ) ÷ 912] x 100 = -27.3%
Formula
Percentage change = [(663 - 912) / 912] x 100
Subtract the new number by the original number
663 - 912 = -249
-249 ÷ 912 = -0.2730263157894737
-0.2730263157894737 x 100 = -27.3%