-73.4% is the change from 485 to 129
Calculation steps:
[( 129 - 485 ) ÷ 485] x 100 = -73.4%
Formula
Percentage change = [(129 - 485) / 485] x 100
Subtract the new number by the original number
129 - 485 = -356
-356 ÷ 485 = -0.734020618556701
-0.734020618556701 x 100 = -73.4%