-7.99% is the change from 388 to 357
Calculation steps:
[( 357 - 388 ) ÷ 388] x 100 = -7.99%
Formula
Percentage change = [(357 - 388) / 388] x 100
Subtract the new number by the original number
357 - 388 = -31
-31 ÷ 388 = -0.07989690721649484
-0.07989690721649484 x 100 = -7.99%