-9.13% is the change from 427 to 388
Calculation steps:
[( 388 - 427 ) ÷ 427] x 100 = -9.13%
Formula
Percentage change = [(388 - 427) / 427] x 100
Subtract the new number by the original number
388 - 427 = -39
-39 ÷ 427 = -0.09133489461358314
-0.09133489461358314 x 100 = -9.13%