-97.01% is the change from 603 to 18
Calculation steps:
[( 18 - 603 ) ÷ 603] x 100 = -97.01%
Formula
Percentage change = [(18 - 603) / 603] x 100
Subtract the new number by the original number
18 - 603 = -585
-585 ÷ 603 = -0.9701492537313433
-0.9701492537313433 x 100 = -97.01%