-13.71% is the change from 394 to 340
Calculation steps:
[( 340 - 394 ) ÷ 394] x 100 = -13.71%
Formula
Percentage change = [(340 - 394) / 394] x 100
Subtract the new number by the original number
340 - 394 = -54
-54 ÷ 394 = -0.13705583756345177
-0.13705583756345177 x 100 = -13.71%