-46.31% is the change from 909 to 488
Calculation steps:
[( 488 - 909 ) ÷ 909] x 100 = -46.31%
Formula
Percentage change = [(488 - 909) / 909] x 100
Subtract the new number by the original number
488 - 909 = -421
-421 ÷ 909 = -0.46314631463146316
-0.46314631463146316 x 100 = -46.31%