43 169 etc you can do using division the GCD function and concatenation. Located at the very top where you have File and Edit Click on Excel Add-ins. Download the Sample File.
The formula bar is located above the rows and columns of cells and beneath the menu bar or ribbon.
To see the ratio enter this formula in cell E4. Next enter 4549 into cell. To show the result of division as a ratio you can use a custom number format. You can copy the formula from cell D3 and paste it into cell D4 once you have Row 4 completed.