-68.23% is the change from 406 to 129
Calculation steps:
[( 129 - 406 ) ÷ 406] x 100 = -68.23%
Formula
Percentage change = [(129 - 406) / 406] x 100
Subtract the new number by the original number
129 - 406 = -277
-277 ÷ 406 = -0.6822660098522167
-0.6822660098522167 x 100 = -68.23%