-83.39% is the change from 596 to 99
Calculation steps:
[( 99 - 596 ) ÷ 596] x 100 = -83.39%
Formula
Percentage change = [(99 - 596) / 596] x 100
Subtract the new number by the original number
99 - 596 = -497
-497 ÷ 596 = -0.8338926174496645
-0.8338926174496645 x 100 = -83.39%