-97.87% is the change from 517 to 11
Calculation steps:
[( 11 - 517 ) ÷ 517] x 100 = -97.87%
Formula
Percentage change = [(11 - 517) / 517] x 100
Subtract the new number by the original number
11 - 517 = -506
-506 ÷ 517 = -0.9787234042553191
-0.9787234042553191 x 100 = -97.87%