-31.2% is the change from 234 to 161
Calculation steps:
[( 161 - 234 ) ÷ 234] x 100 = -31.2%
Formula
Percentage change = [(161 - 234) / 234] x 100
Subtract the new number by the original number
161 - 234 = -73
-73 ÷ 234 = -0.31196581196581197
-0.31196581196581197 x 100 = -31.2%