-98.5% is the change from 602 to 9
Calculation steps:
[( 9 - 602 ) ÷ 602] x 100 = -98.5%
Formula
Percentage change = [(9 - 602) / 602] x 100
Subtract the new number by the original number
9 - 602 = -593
-593 ÷ 602 = -0.9850498338870431
-0.9850498338870431 x 100 = -98.5%