0
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One.
5.6
28/5 = 53/5
2
The HCF is 4
28/5 as a mixed number is 5 3/5 (five and three fifths).
5 3/5
2 goes evenly into 4 and 28
28 goes into 7 and 2, while 30 goes into 15 and 2.
The highest common factor of both number is 28
Any of their factors.
7
It is: 1