The GCF is 45.
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The LCF is 1. The GCF is 45 The LCM is 90.
It is: 9
That would be 15. Only a number ending in five would be a factor of 75. 45 is not. 35 is not. 25 is not. 15 is, and it also is a factor of 90. This makes it the highest common factor of 75 and 90, although it is not a prime factor.
The Greatest Common Factor (GCF) of 45 and 30 is 15. The Least Common Multiple (LCM) of 45 and 30 is 90.
If you can find any common factor of the numerator and denominator, divide each of them by it. 32 and 45 have no common factor (except ' 1 '), so 32/45 is the simplest form. 64 and 90 have the common factor of 2. So if you see 64/90, divide the top and bottom both by 2, and you get 32/45, which is the simplest form.