-51.65% is the change from 515 to 249
Calculation steps:
[( 249 - 515 ) ÷ 515] x 100 = -51.65%
Formula
Percentage change = [(249 - 515) / 515] x 100
Subtract the new number by the original number
249 - 515 = -266
-266 ÷ 515 = -0.516504854368932
-0.516504854368932 x 100 = -51.65%