To convert 0.3 into a fraction, you can simply write it as 3/10. This is because 0.3 is equivalent to 3 tenths.
Here are some examples of how you can represent 0.3 as a fraction in different contexts:
1. If you have 0.3 of a pizza, you would have 3/10 of the whole pizza. 2. If you have 0.3 of a gallon of milk, you would have 3/10 of a gallon. 3. If you have 0.3 of an hour, you would have 3/10 of an hour, which is equivalent to 18 minutes.