-7.36% is the change from 231 to 214
Calculation steps:
[( 214 - 231 ) ÷ 231] x 100 = -7.36%
Formula
Percentage change = [(214 - 231) / 231] x 100
Subtract the new number by the original number
214 - 231 = -17
-17 ÷ 231 = -0.0735930735930736
-0.0735930735930736 x 100 = -7.36%