Evaluate the following
`(-31) div (31)`

Answer

To evaluate the expression \((-31) \div (31)\), we can follow these steps:

### Step 1: Identify the operation
We need to perform the division of \(-31\) by \(31\).

### Step 2: Set up the division
We can write the division as:
\[ -31 \div 31 \]

### Step 3: Perform the division
Now, we divide the absolute values:
\[ 31 \div 31 = 1 \]

### Step 4: Apply the sign
Since we have a negative number divided by a positive number, the result will be negative. Therefore, we take the result from the previous step and apply the negative sign:
\[ -1 \]

### Final Answer
Thus, the final answer is:
\[ \boxed{-1} \]

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