-86.45% is the change from 502 to 68
Calculation steps:
[( 68 - 502 ) ÷ 502] x 100 = -86.45%
Formula
Percentage change = [(68 - 502) / 502] x 100
Subtract the new number by the original number
68 - 502 = -434
-434 ÷ 502 = -0.8645418326693227
-0.8645418326693227 x 100 = -86.45%