-86.86% is the change from 236 to 31
Calculation steps:
[( 31 - 236 ) ÷ 236] x 100 = -86.86%
Formula
Percentage change = [(31 - 236) / 236] x 100
Subtract the new number by the original number
31 - 236 = -205
-205 ÷ 236 = -0.8686440677966102
-0.8686440677966102 x 100 = -86.86%