-26.2% is the change from 313 to 231
Calculation steps:
[( 231 - 313 ) ÷ 313] x 100 = -26.2%
Formula
Percentage change = [(231 - 313) / 313] x 100
Subtract the new number by the original number
231 - 313 = -82
-82 ÷ 313 = -0.26198083067092653
-0.26198083067092653 x 100 = -26.2%