-30.32% is the change from 343 to 239
Calculation steps:
[( 239 - 343 ) ÷ 343] x 100 = -30.32%
Formula
Percentage change = [(239 - 343) / 343] x 100
Subtract the new number by the original number
239 - 343 = -104
-104 ÷ 343 = -0.3032069970845481
-0.3032069970845481 x 100 = -30.32%