-83.12% is the change from 231 to 39
Calculation steps:
[( 39 - 231 ) ÷ 231] x 100 = -83.12%
Formula
Percentage change = [(39 - 231) / 231] x 100
Subtract the new number by the original number
39 - 231 = -192
-192 ÷ 231 = -0.8311688311688312
-0.8311688311688312 x 100 = -83.12%