-98.83% is the change from 515 to 6
Calculation steps:
[( 6 - 515 ) ÷ 515] x 100 = -98.83%
Formula
Percentage change = [(6 - 515) / 515] x 100
Subtract the new number by the original number
6 - 515 = -509
-509 ÷ 515 = -0.9883495145631068
-0.9883495145631068 x 100 = -98.83%