-80.27% is the change from 517 to 102
Calculation steps:
[( 102 - 517 ) ÷ 517] x 100 = -80.27%
Formula
Percentage change = [(102 - 517) / 517] x 100
Subtract the new number by the original number
102 - 517 = -415
-415 ÷ 517 = -0.8027079303675049
-0.8027079303675049 x 100 = -80.27%