Basic Math Examples

15 \div 21

$15 \div 21$

Step 1

Rewrite the division as a fraction.

\frac{15}{21}

$\frac{15}{21}$

Step 2

Cancel the common factor of

15

$15$ and

21

$21$ .

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Step 2.1

Factor

3

$3$ out of

15

$15$ .

\frac{3 (5)}{21}

$\frac{3 (5)}{21}$

Step 2.2

Cancel the common factors.

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Step 2.2.1

Factor

3

$3$ out of

21

$21$ .

\frac{3 \cdot 5}{3 \cdot 7}

$\frac{3 \cdot 5}{3 \cdot 7}$

Step 2.2.2

Cancel the common factor.

$\frac{3 \cdot 5}{3 \cdot 7}$

Step 2.2.3

Rewrite the expression.

$\frac{5}{7}$

$\frac{5}{7}$

$\frac{5}{7}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{5}{7}$

Decimal Form:

$0.\overline{714285}$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$