-2.53% is the change from 237 to 231
Calculation steps:
[( 231 - 237 ) ÷ 237] x 100 = -2.53%
Formula
Percentage change = [(231 - 237) / 237] x 100
Subtract the new number by the original number
231 - 237 = -6
-6 ÷ 237 = -0.02531645569620253
-0.02531645569620253 x 100 = -2.53%