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Anonymous
13 over 15
You divide both figures with the same number until one of them is a Prime number. In this case, you're only able to divide by 2. (then 26 is turned into 13, which is a prime number)
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It is: 30/70 = 3/7.
5/7
52/60=26/30 =13/15
21/30 = 7/10 in its lowest terms