Question

how can the decimal 0.57 be written as a fraction

Answer 1

57/100
If the last number is in the hundredths place then write a 100 under the number and forget about the 0 at the beginning

Answer 2

If you want to convert 0.57 into a fraction, you can do it like this:

0.57 equals to 57/100 (you can't do anything else because 57 and 100 don't have common factors).

The result is 57/100.