-86.4% is the change from 228 to 31
Calculation steps:
[( 31 - 228 ) ÷ 228] x 100 = -86.4%
Formula
Percentage change = [(31 - 228) / 228] x 100
Subtract the new number by the original number
31 - 228 = -197
-197 ÷ 228 = -0.8640350877192983
-0.8640350877192983 x 100 = -86.4%