-90.52% is the change from 517 to 49
Calculation steps:
[( 49 - 517 ) ÷ 517] x 100 = -90.52%
Formula
Percentage change = [(49 - 517) / 517] x 100
Subtract the new number by the original number
49 - 517 = -468
-468 ÷ 517 = -0.9052224371373307
-0.9052224371373307 x 100 = -90.52%