-95.53% is the change from 515 to 23
Calculation steps:
[( 23 - 515 ) ÷ 515] x 100 = -95.53%
Formula
Percentage change = [(23 - 515) / 515] x 100
Subtract the new number by the original number
23 - 515 = -492
-492 ÷ 515 = -0.9553398058252427
-0.9553398058252427 x 100 = -95.53%