To convert 5.3 to a fraction, we can use the following steps:

1. Write 5.3 as a fraction with a denominator of 1: 5.3/1
2. Count the number of digits after the decimal point (in this case, 1 digit).
3. Multiply both the numerator and denominator by 10 to the power of the number of digits after the decimal point (in this case, 10).
4. Simplify the resulting fraction if possible.

Using these steps, we get:

5.3/1 = 53/10

Therefore, 5.3 as a fraction is 53/10.