-97.87% is the change from 609 to 13
Calculation steps:
[( 13 - 609 ) ÷ 609] x 100 = -97.87%
Formula
Percentage change = [(13 - 609) / 609] x 100
Subtract the new number by the original number
13 - 609 = -596
-596 ÷ 609 = -0.9786535303776683
-0.9786535303776683 x 100 = -97.87%