Pre-Algebra Examples

$\frac{21}{\frac{4}{- 2}}$

Step 1

Cancel the common factor of $4$ and $- 2$ .

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Step 1.1

Factor $2$ out of $4$ .

$\frac{21}{\frac{2 (2)}{- 2}}$

Step 1.2

Move the negative one from the denominator of $\frac{2}{- 1}$ .

$\frac{21}{- 1 \cdot 2}$

Step 2

Simplify the expression.

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Step 2.1

Multiply $- 1$ by $2$ .

$\frac{21}{- 2}$

Step 2.2

Move the negative in front of the fraction.

$- \frac{21}{2}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$- \frac{21}{2}$

Decimal Form:

$- 10.5$

Mixed Number Form:

$- 10 \frac{1}{2}$