Excel 2003 Creating Complex Formulas Challenge! Open your Monthly Budget spreadsheet. Fill the formula defined in cell C17 to D17 through N17. Type Percent Saved in A18. Write a formula in C18 that divides your monthly Savings amount (C17) by your monthly Income (C16). Save and close the Monthly Budget spreadsheet. 1 2 3 4 5 6 7 8 9