-97.85% is the change from 512 to 11
Calculation steps:
[( 11 - 512 ) ÷ 512] x 100 = -97.85%
Formula
Percentage change = [(11 - 512) / 512] x 100
Subtract the new number by the original number
11 - 512 = -501
-501 ÷ 512 = -0.978515625
-0.978515625 x 100 = -97.85%