-40.82% is the change from 490 to 290
Calculation steps:
[( 290 - 490 ) ÷ 490] x 100 = -40.82%
Formula
Percentage change = [(290 - 490) / 490] x 100
Subtract the new number by the original number
290 - 490 = -200
-200 ÷ 490 = -0.40816326530612246
-0.40816326530612246 x 100 = -40.82%