-83.44% is the change from 598 to 99
Calculation steps:
[( 99 - 598 ) ÷ 598] x 100 = -83.44%
Formula
Percentage change = [(99 - 598) / 598] x 100
Subtract the new number by the original number
99 - 598 = -499
-499 ÷ 598 = -0.8344481605351171
-0.8344481605351171 x 100 = -83.44%