-40.46% is the change from 388 to 231
Calculation steps:
[( 231 - 388 ) ÷ 388] x 100 = -40.46%
Formula
Percentage change = [(231 - 388) / 388] x 100
Subtract the new number by the original number
231 - 388 = -157
-157 ÷ 388 = -0.40463917525773196
-0.40463917525773196 x 100 = -40.46%