-15.57% is the change from 912 to 770
Calculation steps:
[( 770 - 912 ) ÷ 912] x 100 = -15.57%
Formula
Percentage change = [(770 - 912) / 912] x 100
Subtract the new number by the original number
770 - 912 = -142
-142 ÷ 912 = -0.15570175438596492
-0.15570175438596492 x 100 = -15.57%