[header] How to cancel fractions [title] Understand what a factor is. [step] A factor is one of the numbers that can be multiplied evenly by another number to get a third number. For instance, a factor of 6 is 2 because 2 times 3 equals 6. 
[title] Write out the factors of each number. [step] The easiest way to write out all the factors is to begin with 1 and the number.