-83% is the change from 912 to 155
Calculation steps:
[( 155 - 912 ) ÷ 912] x 100 = -83%
Formula
Percentage change = [(155 - 912) / 912] x 100
Subtract the new number by the original number
155 - 912 = -757
-757 ÷ 912 = -0.8300438596491229
-0.8300438596491229 x 100 = -83%