» The Minus Sign Appears to the Right of the Number in Excel 2007

To move the minus sign from right to left:

Use the following formula:
=VALUE(IF(RIGHT(A1,1)="-",RIGHT(A1,1)&LEFT(A1,LEN(A1)-1),A1))

Or
1. Select the column containing numbers.
2. Select Data -> Convert Text to Table (in Data Tools Group).
3. In Step 1, select the Fixed width option button and click Next.
4. In Step 2 click Next.
5. In Step 3 click Advanced, check the box in Trailing minus for negative numbers.
6. Click Ok and then click Finish.