-15.79% is the change from 912 to 768
Calculation steps:
[( 768 - 912 ) ÷ 912] x 100 = -15.79%
Formula
Percentage change = [(768 - 912) / 912] x 100
Subtract the new number by the original number
768 - 912 = -144
-144 ÷ 912 = -0.15789473684210525
-0.15789473684210525 x 100 = -15.79%