When writing mathematical equations in Word 2013, you aren't limited to typing on a single horizontal line, nor to using the slash to represent division. Use the Symbol menu to insert a division sign, or create an equation to work with more complex division equations.
Insert a Symbol
Open the Insert tab, click Symbol and pick the ÷ division symbol to insert it in your document. Repeat the same step for each symbol you need, or paste the first division symbol.
Insert a Division Equation
Click the Equation icon on the Insert tab to start a new equation.
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Type your equation using the / key for division. After you type a division equation, Word automatically reformats it vertically, in the format of a fraction.
Click the ÷ division symbol on the Design tab to insert the symbol in an equation. Division equations written using the symbol rather than a slash do not reformat as fractions.