The lowest common denominator is 1/4 x 1/9 = 1/36. 1/4 = 36/4x1 x 1/36 = 9/36 7/9 = 36/9x7 x 1/36 = 28/36 28/36 - 9/36 = 21/36 = 7/12
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1/5 has no improper fraction and 2/5 has no imporper fraction
42/7 is an improper fraction.
The fraction 25 over 18 reduced to its simplest terms = 17/18
.2 is 20% so in fraction form is 2 over 10 or simplified 1 over 5
11 over 3