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No, 18/15 is not in simplest form. Try 6/5
15/18 can be reduced to 5/6
1 15/18
5/6
33
5/6
15/54 '3' is a common factor , so cancel down by '3' Hence 5/18 The simplest form!!!!!
18/45 = 6/15 = 2/5
(15/18) = (5/6)(3/3) = (5/6)
0.2778
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 3, 15/18 is equal to 5/6 or five sixths.
I am assuming that you mean 15 meters by 18 meters. 15:18 = 5:6