-0.39% is the change from 515 to 513
Calculation steps:
[( 513 - 515 ) ÷ 515] x 100 = -0.39%
Formula
Percentage change = [(513 - 515) / 515] x 100
Subtract the new number by the original number
513 - 515 = -2
-2 ÷ 515 = -0.003883495145631068
-0.003883495145631068 x 100 = -0.39%