-90.57% is the change from 912 to 86
Calculation steps:
[( 86 - 912 ) ÷ 912] x 100 = -90.57%
Formula
Percentage change = [(86 - 912) / 912] x 100
Subtract the new number by the original number
86 - 912 = -826
-826 ÷ 912 = -0.9057017543859649
-0.9057017543859649 x 100 = -90.57%