-99.61% is the change from 515 to 2
Calculation steps:
[( 2 - 515 ) ÷ 515] x 100 = -99.61%
Formula
Percentage change = [(2 - 515) / 515] x 100
Subtract the new number by the original number
2 - 515 = -513
-513 ÷ 515 = -0.996116504854369
-0.996116504854369 x 100 = -99.61%