-40.21% is the change from 485 to 290
Calculation steps:
[( 290 - 485 ) ÷ 485] x 100 = -40.21%
Formula
Percentage change = [(290 - 485) / 485] x 100
Subtract the new number by the original number
290 - 485 = -195
-195 ÷ 485 = -0.4020618556701031
-0.4020618556701031 x 100 = -40.21%