To convert the decimal number $0.65$ into a fraction, follow these steps:

1. Write the decimal as a fraction:
   $0.65 = \frac{65}{100}$

2. Simplify the fraction:
   Both the numerator and the denominator can be divided by their greatest common divisor (GCD), which is 5 in this case.
   $\frac{65 \div 5}{100 \div 5} = \frac{13}{20}$

So, $0.65$ as a fraction is $\frac{13}{20}$.

Would you like more details or have any questions?

Here are five related questions:

1. How would you convert 0.75 to a fraction?
2. What is the fraction form of 0.125?
3. How do you convert a repeating decimal like 0.333... to a fraction?
4. What is the fraction form of 1.2?
5. How do you simplify the fraction $\frac{45}{100}$?

Tip: To simplify fractions, always look for the greatest common divisor (GCD) of the numerator and the denominator.