-81.24% is the change from 517 to 97
Calculation steps:
[( 97 - 517 ) ÷ 517] x 100 = -81.24%
Formula
Percentage change = [(97 - 517) / 517] x 100
Subtract the new number by the original number
97 - 517 = -420
-420 ÷ 517 = -0.8123791102514507
-0.8123791102514507 x 100 = -81.24%