-9.33% is the change from 343 to 311
Calculation steps:
[( 311 - 343 ) ÷ 343] x 100 = -9.33%
Formula
Percentage change = [(311 - 343) / 343] x 100
Subtract the new number by the original number
311 - 343 = -32
-32 ÷ 343 = -0.09329446064139942
-0.09329446064139942 x 100 = -9.33%