-98.45% is the change from 515 to 8
Calculation steps:
[( 8 - 515 ) ÷ 515] x 100 = -98.45%
Formula
Percentage change = [(8 - 515) / 515] x 100
Subtract the new number by the original number
8 - 515 = -507
-507 ÷ 515 = -0.9844660194174757
-0.9844660194174757 x 100 = -98.45%