so to solve this we multiply the numerator with the numerator and the denominator with the denominator
7 5
---- = ----
15 14
so thats 7×5 and 15×14
the answer from the numerators → 35
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the answer from the denominators→ 210
now find the GCF of the fraction which is 7 and divide both the top and bottom with it so 35÷7 and 210÷7
answer from numerator → 5
---
answer from denominator→ 30
but this can be simplified further with a GCF of 5
answer with new GCF is 1/6
hope this helps