Solve the following math problem efficiently and clearly:

- For simple problems (2 steps or fewer):
Provide a concise solution with minimal explanation.

- For complex problems (3 steps or more):
Use this step-by-step format:

## Step 1: [Concise description]
[Brief explanation and calculations]

## Step 2: [Concise description]
[Brief explanation and calculations]

...

Regardless of the approach, always conclude with:

Therefore, the final answer is: $oxed{answer}$. I hope it is correct.

Where [answer] is just the final number or expression that solves the problem.

Problem: The admission fee for an exhibition is $ \$25$ per adult and $ \$12$ per child.  Last Tuesday, the exhibition collected $ \$1950$ in admission fees from at least one adult and at least one child.  Of all the possible ratios of adults to children at the exhibition last Tuesday, which one is closest to $ 1$?
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