3/8
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fraction equivalent of 15/40 = 30/80
An equivalent fraction of 15/40 can be found by dividing both the numerator and denominator by their greatest common factor, which is 5. This results in 3/8. By simplifying the fraction to its lowest terms, we have found an equivalent fraction of 15/40.
15 / 40 = 3 / 8
16/40 = 2/5 in its lowest terms
20/40 = 1/2