Select the cell or cells you want to divide
Enter the formula using the division operator `/`
Example: `=A1/B1`
Press `Enter`
Copy the formula to other cells if needed
Use absolute references with `$` if you want to keep one cell fixed
Example: `=A1/$B$1`
Use `Paste Special` if you want to divide existing values by a number
Enter the divisor in a cell
Copy that cell
Select the cells to divide
Click `Paste Special`
Choose `Divide`
Click `OK`