3 to 7.
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GCF(210, 90) = 30.
The GCF is 30.
210 is not prime. 210 = 2 * 3 * 5 * 7
90% = 90/100 which can be simplified.
Well, honey, to change 210 into a mixed number, you divide 210 by the denominator of the fraction you want. So, if you want it as a fraction, it's 210/1. If you want it as a mixed number, it's 210 divided by 1 which equals 210 with a remainder of 0, so the mixed number is 210.