-57.32% is the change from 909 to 388
Calculation steps:
[( 388 - 909 ) ÷ 909] x 100 = -57.32%
Formula
Percentage change = [(388 - 909) / 909] x 100
Subtract the new number by the original number
388 - 909 = -521
-521 ÷ 909 = -0.5731573157315731
-0.5731573157315731 x 100 = -57.32%