-46.09% is the change from 909 to 490
Calculation steps:
[( 490 - 909 ) ÷ 909] x 100 = -46.09%
Formula
Percentage change = [(490 - 909) / 909] x 100
Subtract the new number by the original number
490 - 909 = -419
-419 ÷ 909 = -0.46094609460946095
-0.46094609460946095 x 100 = -46.09%