-51.76% is the change from 510 to 246
Calculation steps:
[( 246 - 510 ) ÷ 510] x 100 = -51.76%
Formula
Percentage change = [(246 - 510) / 510] x 100
Subtract the new number by the original number
246 - 510 = -264
-264 ÷ 510 = -0.5176470588235295
-0.5176470588235295 x 100 = -51.76%