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4/27
189 and 40 have no factor in common and so the fraction cannot be reduced.
28 over 20 reduced = 7/5
28/52 = 7/13
No 28/29 cannot be reduced.
189% reduces to: 1 89/100
1/2
15/28
9/14
It is: 7/4
2 over 7
28/70= .4 or (2/5)
28/38 = 14/19