137.37% is the change from 388 to 921
Calculation steps:
[( 921 - 388 ) ÷ 388] x 100 = 137.37%
Formula
Percentage change = [(921 - 388) / 388] x 100
Subtract the new number by the original number
921 - 388 = 533
533 ÷ 388 = 1.3737113402061856
1.3737113402061856 x 100 = 137.37%