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Anonymous
67 and 53 are both prime numbers, meaning they only have factors of themselves and one. Because of this, they have no common factors greater than one and cannot be reduced.
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simplify the ratio 18b^2 to 45b
21/7 = 3 Or, a 3 to 1 ratio.
5:2
132:9
53 is a prime number if that is what you mean.