-99.34% is the change from 609 to 4
Calculation steps:
[( 4 - 609 ) ÷ 609] x 100 = -99.34%
Formula
Percentage change = [(4 - 609) / 609] x 100
Subtract the new number by the original number
4 - 609 = -605
-605 ÷ 609 = -0.993431855500821
-0.993431855500821 x 100 = -99.34%