Pre-Algebra Examples

$\frac{3}{4} - \frac{9}{12}$

Step 1

Cancel the common factor of $9$ and $12$ .

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Step 1.1

Factor $3$ out of $9$ .

$\frac{3}{4} - \frac{3 (3)}{12}$

Step 1.2

Cancel the common factors.

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Step 1.2.1

Factor $3$ out of $12$ .

$\frac{3}{4} - \frac{3 \cdot 3}{3 \cdot 4}$

Step 1.2.2

Cancel the common factor.

$\frac{3}{4} - \frac{3 \cdot 3}{3 \cdot 4}$

Step 1.2.3

Rewrite the expression.

$\frac{3}{4} - \frac{3}{4}$

Step 2

Combine the numerators over the common denominator.

$\frac{3 - 3}{4}$

Step 3

Simplify the expression.

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Step 3.1

Subtract $3$ from $3$ .

$\frac{0}{4}$

Step 3.2

Divide $0$ by $4$ .

$0$