The number 0.6 is equal to 3 over 5 as a fraction, or 3/5. Because the 6 in 0.6 is in the 10th column, it can be converted to 6 over 10 from inspection, and then reduced by dividing both the numerator and denominator by 2.
Numbers can typically be presented as either fractions or decimals. A decimal number refers to any number without a written denominator, while a fraction always has a numerator an denominator. To convert a decimal into a fraction, put the numbers to the right of the decimal place over a number that is equivalent to the number places occupied. For example, 0.99 can be written as 99/100 since it occupies the 10th and 100th number places.