-50.39% is the change from 508 to 252
Calculation steps:
[( 252 - 508 ) ÷ 508] x 100 = -50.39%
Formula
Percentage change = [(252 - 508) / 508] x 100
Subtract the new number by the original number
252 - 508 = -256
-256 ÷ 508 = -0.5039370078740157
-0.5039370078740157 x 100 = -50.39%