-30.54% is the change from 609 to 423
Calculation steps:
[( 423 - 609 ) ÷ 609] x 100 = -30.54%
Formula
Percentage change = [(423 - 609) / 609] x 100
Subtract the new number by the original number
423 - 609 = -186
-186 ÷ 609 = -0.3054187192118227
-0.3054187192118227 x 100 = -30.54%