-83.91% is the change from 603 to 97
Calculation steps:
[( 97 - 603 ) ÷ 603] x 100 = -83.91%
Formula
Percentage change = [(97 - 603) / 603] x 100
Subtract the new number by the original number
97 - 603 = -506
-506 ÷ 603 = -0.8391376451077943
-0.8391376451077943 x 100 = -83.91%