Need Number Format Help in PHP

I have a number coming into a php echo statement that looks like 0293 and i want to output it looking like 29.3 and for the life of me i cannot figure out how to do it with available php functions like number_format, sprintf, or printf.

Sample Data:

0293
0304
0282
0310
1324
2000

Desired Output

29.3
30.4
28.2
31.0
132.4
200.0

Any suggestions on how this could be achieved?

Something like this?

printf("%.1f",$var/10);

Your solution gave me an idea and it worked:

number_format(($myvar/10), 1, '.',',')

Thanks for your help!