-90.33% is the change from 517 to 50
Calculation steps:
[( 50 - 517 ) ÷ 517] x 100 = -90.33%
Formula
Percentage change = [(50 - 517) / 517] x 100
Subtract the new number by the original number
50 - 517 = -467
-467 ÷ 517 = -0.9032882011605415
-0.9032882011605415 x 100 = -90.33%