Answer:
The ratio is already in simplest form
Step-by-step explanation:
Note the factors of both numbers:
12: 1, 2, 3, 4, 6, 12
5: 1, 5
They do not share any factors (except for one, which doesn't count), therefore, you cannot simplify both of them (as what you do to one side, you have to do to the other).
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