-13.64% is the change from 396 to 342
Calculation steps:
[( 342 - 396 ) ÷ 396] x 100 = -13.64%
Formula
Percentage change = [(342 - 396) / 396] x 100
Subtract the new number by the original number
342 - 396 = -54
-54 ÷ 396 = -0.13636363636363635
-0.13636363636363635 x 100 = -13.64%