-53.06% is the change from 490 to 230
Calculation steps:
[( 230 - 490 ) ÷ 490] x 100 = -53.06%
Formula
Percentage change = [(230 - 490) / 490] x 100
Subtract the new number by the original number
230 - 490 = -260
-260 ÷ 490 = -0.5306122448979592
-0.5306122448979592 x 100 = -53.06%