Answer:
The First one, the Fourth one, and the Fifth one
Explanation:
They are the only fractions that cannot be reduced due to not being able to find any common factor to divide from the numerator and denominator to get a simpler fraction.
The fractions in the simplest form are:
1) 9/14
2) 18/23
3) 8/15
This is because there cannot be reduce further to any lowest form.
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