-13.4% is the change from 388 to 336
Calculation steps:
[( 336 - 388 ) ÷ 388] x 100 = -13.4%
Formula
Percentage change = [(336 - 388) / 388] x 100
Subtract the new number by the original number
336 - 388 = -52
-52 ÷ 388 = -0.13402061855670103
-0.13402061855670103 x 100 = -13.4%