The lowest common factor is always 1 ( or -1 if you allow negative numbers)-- not very interesting- the usual question is, "What is the highest common factor? " (2 in this case) or
"What is the lowest common multiple?" (14 * 13 in this case)
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23/26 is the lowest form because 23 is a prime number and does not have any factor other than 1 in common with 26.
63/78. You need to find a common factor of 63 and 78 and divide the fractions until they no longer have factors in common. Both 63 and 78 are divisible by 3. 21/26. 21 and 26 have no common factors so 21/26 is the lowest/simplest form.
4/26 = 2/13 in lowest termTo simplify 4/26 to its lowest term:1. Get the Greatest Common Factor (GCF) of 4 & 26.4 = 2 x 226 = 2 x ...13=========GCF=22. Divide the numerator and denominator by their GCF.4/26 = (4 ÷ 2) / (26 ÷ 2) = 2/13
26
The same as the greatest common factor of 70 and 26 - where 26 is the remainder of the division (196 divided by 70). Continue dividing, to get ever-smaller numbers - until one of the numbers is a multiple of the other. When this happens, the smaller of the numbers is the greatest common factor. This method is called the Euclid algorithm.