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.
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Percentages are fractions over 100. So 45% is 45/100 You can then simplify that to 9/20
With enormous difficulty - since the fraction 5 over 9 cannot be simplified!
12/45 = 4/15
45/64 is already in its simplest form
45/113 is already in its simplest form