UBRR: USART Baud Rate Register

[logistic_guy]

here is the question

Find the UBRR for the following baud rates (in both decimal and hex) if XTAL $\displaystyle = 16$ MHz and U$\displaystyle 2$X $\displaystyle = 0$.

(a) 9600
(b) 19200
(c) 38400
(d) 57600

my attemb
it's easy to find the UBRR because there's formula
$\displaystyle UBRR = \frac{XTAL}{16\times BR} - 1 = \frac{16000000}{16 \times 9600} - 1= \frac{10000}{96} - 1$

$\displaystyle = 103.2$

how to convert this to hexadecimal and what's the difference between U$\displaystyle 2$X $\displaystyle = 0$ and U$\displaystyle 2$X $\displaystyle = 1$?
it ask me same question with U$\displaystyle 2$X $\displaystyle = 1$