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 \(\displaystyle = 1\)