-54.02% is the change from 609 to 280
Calculation steps:
[( 280 - 609 ) ÷ 609] x 100 = -54.02%
Formula
Percentage change = [(280 - 609) / 609] x 100
Subtract the new number by the original number
280 - 609 = -329
-329 ÷ 609 = -0.5402298850574713
-0.5402298850574713 x 100 = -54.02%