-10.64% is the change from 912 to 815
Calculation steps:
[( 815 - 912 ) ÷ 912] x 100 = -10.64%
Formula
Percentage change = [(815 - 912) / 912] x 100
Subtract the new number by the original number
815 - 912 = -97
-97 ÷ 912 = -0.10635964912280702
-0.10635964912280702 x 100 = -10.64%