The simplest fraction that is equal to 0.3 is 3/10. Other fractions that are equal to 0.3 are 6/20, 9/30, 30/100 and any other fraction that can be reduced to 3/10.
One can write a decimal as a fraction using a simple procedure. First, write down the decimal divided by one, which in this case would be 0.3/1. Multiply the top and bottom parts of the fraction by 10 until both are whole numbers. In the case of 0.3, multiply each part by 10 to get the result 0.3 equals 3/10. As three and 10 have no common factors, 3/10 is the simplest fraction that is equal to 0.3.