-97.86% is the change from 515 to 11
Calculation steps:
[( 11 - 515 ) ÷ 515] x 100 = -97.86%
Formula
Percentage change = [(11 - 515) / 515] x 100
Subtract the new number by the original number
11 - 515 = -504
-504 ÷ 515 = -0.9786407766990292
-0.9786407766990292 x 100 = -97.86%