splitting hexadecimal byte

Using Arduino Programming Questions
8

Well you have a collection of bits that look something like this:
00001001
00000111

So if you just moved the 1's out of the way on one of the numbers (bitshift left), you'd get this:
00001001
01110000

Then, since there is only one "1" in each column, you can either add or bitwise-OR them together to get a combined byte.