How do you write 0.090 as a fraction?

To write 0.090 as a fraction, you need to consider the place value of each digit. The zero before the decimal point has no value, so we can ignore it. The 9 in the tenths place represents 9/10, and the 0 in the hundredths place represents 0/100. Therefore, 0.090 can be written as 9/10 or 9/10.