-49.9% is the change from 519 to 260
Calculation steps:
[( 260 - 519 ) ÷ 519] x 100 = -49.9%
Formula
Percentage change = [(260 - 519) / 519] x 100
Subtract the new number by the original number
260 - 519 = -259
-259 ÷ 519 = -0.49903660886319845
-0.49903660886319845 x 100 = -49.9%