-99.42% is the change from 515 to 3
Calculation steps:
[( 3 - 515 ) ÷ 515] x 100 = -99.42%
Formula
Percentage change = [(3 - 515) / 515] x 100
Subtract the new number by the original number
3 - 515 = -512
-512 ÷ 515 = -0.9941747572815534
-0.9941747572815534 x 100 = -99.42%