-95.15% is the change from 515 to 25
Calculation steps:
[( 25 - 515 ) ÷ 515] x 100 = -95.15%
Formula
Percentage change = [(25 - 515) / 515] x 100
Subtract the new number by the original number
25 - 515 = -490
-490 ÷ 515 = -0.9514563106796117
-0.9514563106796117 x 100 = -95.15%