-84.91% is the change from 603 to 91
Calculation steps:
[( 91 - 603 ) ÷ 603] x 100 = -84.91%
Formula
Percentage change = [(91 - 603) / 603] x 100
Subtract the new number by the original number
91 - 603 = -512
-512 ÷ 603 = -0.8490878938640133
-0.8490878938640133 x 100 = -84.91%