-6.1% is the change from 246 to 231
Calculation steps:
[( 231 - 246 ) ÷ 246] x 100 = -6.1%
Formula
Percentage change = [(231 - 246) / 246] x 100
Subtract the new number by the original number
231 - 246 = -15
-15 ÷ 246 = -0.06097560975609756
-0.06097560975609756 x 100 = -6.1%