-97.71% is the change from 523 to 12
Calculation steps:
[( 12 - 523 ) ÷ 523] x 100 = -97.71%
Formula
Percentage change = [(12 - 523) / 523] x 100
Subtract the new number by the original number
12 - 523 = -511
-511 ÷ 523 = -0.9770554493307839
-0.9770554493307839 x 100 = -97.71%