-32.65% is the change from 343 to 231
Calculation steps:
[( 231 - 343 ) ÷ 343] x 100 = -32.65%
Formula
Percentage change = [(231 - 343) / 343] x 100
Subtract the new number by the original number
231 - 343 = -112
-112 ÷ 343 = -0.32653061224489793
-0.32653061224489793 x 100 = -32.65%