Two numbers are relatively prime if they have no common factor other than 1. Equivalently, if their highest common factor is 1.
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A number is never relatively prime.Relatively prime refers to a pair of numbers.
2 x 2 x 2 x 5 = 40 2 x 7 x 7 = 98 The GCF is 2. The numbers are not relatively prime.
Prime numbers have only two factors. Composite numbers have more than two.
This is because the two numbers, the numerator and denominator have no common factors. If it were 2 over 4, you could factor out a 2 from both the top and bottom, making it 1 over 2. Two numbers without common factors are called relatively prime. Because 31 and 33 are relatively prime, they can not be simplified.
Prime numbers have two factors. Composite numbers have more than two.