Basic Math Examples

$\frac{2}{7} - \frac{1}{3}$

Step 1

To write

$\frac{2}{7}$ as a fraction with a common denominator, multiply by

$\frac{3}{3}$ .

$\frac{2}{7} \cdot \frac{3}{3} - \frac{1}{3}$

Step 2

To write

$- \frac{1}{3}$ as a fraction with a common denominator, multiply by

$\frac{7}{7}$ .

$\frac{2}{7} \cdot \frac{3}{3} - \frac{1}{3} \cdot \frac{7}{7}$

Step 3

Write each expression with a common denominator of

$21$ , by multiplying each by an appropriate factor of

$1$ .

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Step 3.1

Multiply

$\frac{2}{7}$ by

$\frac{3}{3}$ .

$\frac{2 \cdot 3}{7 \cdot 3} - \frac{1}{3} \cdot \frac{7}{7}$

Step 3.2

Multiply

$7$ by

$3$ .

$\frac{2 \cdot 3}{21} - \frac{1}{3} \cdot \frac{7}{7}$

Step 3.3

Multiply

$\frac{1}{3}$ by

$\frac{7}{7}$ .

$\frac{2 \cdot 3}{21} - \frac{7}{3 \cdot 7}$

Step 3.4

Multiply

$3$ by

$7$ .

$\frac{2 \cdot 3}{21} - \frac{7}{21}$

Step 4

Combine the numerators over the common denominator.

$\frac{2 \cdot 3 - 7}{21}$

Step 5

Simplify the numerator.

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Step 5.1

Multiply

$2$ by

$3$ .

$\frac{6 - 7}{21}$

Step 5.2

Subtract

$7$ from

$6$ .

$\frac{- 1}{21}$

Step 6

Move the negative in front of the fraction.

$- \frac{1}{21}$

Step 7

The result can be shown in multiple forms.

Exact Form:

$- \frac{1}{21}$

Decimal Form:

$- 0.\overline{047619}$