-83.31% is the change from 599 to 100
Calculation steps:
[( 100 - 599 ) ÷ 599] x 100 = -83.31%
Formula
Percentage change = [(100 - 599) / 599] x 100
Subtract the new number by the original number
100 - 599 = -499
-499 ÷ 599 = -0.8330550918196995
-0.8330550918196995 x 100 = -83.31%