-86.85% is the change from 517 to 68
Calculation steps:
[( 68 - 517 ) ÷ 517] x 100 = -86.85%
Formula
Percentage change = [(68 - 517) / 517] x 100
Subtract the new number by the original number
68 - 517 = -449
-449 ÷ 517 = -0.8684719535783365
-0.8684719535783365 x 100 = -86.85%