-24.76% is the change from 307 to 231
Calculation steps:
[( 231 - 307 ) ÷ 307] x 100 = -24.76%
Formula
Percentage change = [(231 - 307) / 307] x 100
Subtract the new number by the original number
231 - 307 = -76
-76 ÷ 307 = -0.247557003257329
-0.247557003257329 x 100 = -24.76%