-99.42% is the change from 517 to 3
Calculation steps:
[( 3 - 517 ) ÷ 517] x 100 = -99.42%
Formula
Percentage change = [(3 - 517) / 517] x 100
Subtract the new number by the original number
3 - 517 = -514
-514 ÷ 517 = -0.9941972920696325
-0.9941972920696325 x 100 = -99.42%