-49.71% is the change from 519 to 261
Calculation steps:
[( 261 - 519 ) ÷ 519] x 100 = -49.71%
Formula
Percentage change = [(261 - 519) / 519] x 100
Subtract the new number by the original number
261 - 519 = -258
-258 ÷ 519 = -0.49710982658959535
-0.49710982658959535 x 100 = -49.71%