-86.7% is the change from 233 to 31
Calculation steps:
[( 31 - 233 ) ÷ 233] x 100 = -86.7%
Formula
Percentage change = [(31 - 233) / 233] x 100
Subtract the new number by the original number
31 - 233 = -202
-202 ÷ 233 = -0.8669527896995708
-0.8669527896995708 x 100 = -86.7%