-81.17% is the change from 515 to 97
Calculation steps:
[( 97 - 515 ) ÷ 515] x 100 = -81.17%
Formula
Percentage change = [(97 - 515) / 515] x 100
Subtract the new number by the original number
97 - 515 = -418
-418 ÷ 515 = -0.8116504854368932
-0.8116504854368932 x 100 = -81.17%