how do you write 11 hundredths as a percent
You would write 11 cents as $0.11 or $.11 in decimal form.
You can write is as 11 followed by a superscript 2 - thus: 112
12122
I am not sure that it is possible to write in radio. In the form of a ratio it is 3:11 or 3/11.
11 or 11.0
11,000,011
11,000,000,011
11111
It is 12111.
11,011,011,011
11 x 11