-27.71% is the change from 231 to 167
Calculation steps:
[( 167 - 231 ) ÷ 231] x 100 = -27.71%
Formula
Percentage change = [(167 - 231) / 231] x 100
Subtract the new number by the original number
167 - 231 = -64
-64 ÷ 231 = -0.27705627705627706
-0.27705627705627706 x 100 = -27.71%