-82.91% is the change from 515 to 88
Calculation steps:
[( 88 - 515 ) ÷ 515] x 100 = -82.91%
Formula
Percentage change = [(88 - 515) / 515] x 100
Subtract the new number by the original number
88 - 515 = -427
-427 ÷ 515 = -0.829126213592233
-0.829126213592233 x 100 = -82.91%