-11.42% is the change from 438 to 388
Calculation steps:
[( 388 - 438 ) ÷ 438] x 100 = -11.42%
Formula
Percentage change = [(388 - 438) / 438] x 100
Subtract the new number by the original number
388 - 438 = -50
-50 ÷ 438 = -0.1141552511415525
-0.1141552511415525 x 100 = -11.42%