-50.38% is the change from 260 to 129
Calculation steps:
[( 129 - 260 ) ÷ 260] x 100 = -50.38%
Formula
Percentage change = [(129 - 260) / 260] x 100
Subtract the new number by the original number
129 - 260 = -131
-131 ÷ 260 = -0.5038461538461538
-0.5038461538461538 x 100 = -50.38%