-19.87% is the change from 609 to 488
Calculation steps:
[( 488 - 609 ) ÷ 609] x 100 = -19.87%
Formula
Percentage change = [(488 - 609) / 609] x 100
Subtract the new number by the original number
488 - 609 = -121
-121 ÷ 609 = -0.1986863711001642
-0.1986863711001642 x 100 = -19.87%