-30.87% is the change from 609 to 421
Calculation steps:
[( 421 - 609 ) ÷ 609] x 100 = -30.87%
Formula
Percentage change = [(421 - 609) / 609] x 100
Subtract the new number by the original number
421 - 609 = -188
-188 ÷ 609 = -0.30870279146141216
-0.30870279146141216 x 100 = -30.87%