-98.25% is the change from 515 to 9
Calculation steps:
[( 9 - 515 ) ÷ 515] x 100 = -98.25%
Formula
Percentage change = [(9 - 515) / 515] x 100
Subtract the new number by the original number
9 - 515 = -506
-506 ÷ 515 = -0.9825242718446602
-0.9825242718446602 x 100 = -98.25%