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Q: What is Reduce each fraction by method of prime factor 65 and 91?

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You cannot. Prime factors are defined in the context of whole numbers, not of fractions.

68

First reduce the fraction to its simplest form. If the denominator has any prime factor other than 2 or 5 then it is a repeating decimal. Otherwise it terminates.

listing method prime factorization decomposition method

Factor trees and factor rainbows.

Since prime numbers only have one prime factor (themselves), factor trees are unnecessary.

A factor rainbow is a method to determine a prime factorization.

It is called simplification.

The fraction 85/130 will reduce by a factor of 5 to 17/26and because 17 is prime and will not divide into 26, that is as simple as it gets.

When they have no factor in common, or their HCF is 1.

No, prime refers to whole numbers. In the situation you describe, a fraction is in its simplest form.

3 is a prime number. Prime numbers don't have factor trees. The factors of 3 are 1 and 3.

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