Basic Math Examples

\frac{1}{3} - \frac{4}{5}

$\frac{1}{3} - \frac{4}{5}$

Step 1

To write

\frac{1}{3}

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

\frac{5}{5}

$\frac{5}{5}$ .

\frac{1}{3} \cdot \frac{5}{5} - \frac{4}{5}

$\frac{1}{3} \cdot \frac{5}{5} - \frac{4}{5}$

Step 2

To write

- \frac{4}{5}

$- \frac{4}{5}$ as a fraction with a common denominator, multiply by

\frac{3}{3}

$\frac{3}{3}$ .

\frac{1}{3} \cdot \frac{5}{5} - \frac{4}{5} \cdot \frac{3}{3}

$\frac{1}{3} \cdot \frac{5}{5} - \frac{4}{5} \cdot \frac{3}{3}$

Step 3

Write each expression with a common denominator of

15

$15$ , by multiplying each by an appropriate factor of

1

$1$ .

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Step 3.1

Multiply

\frac{1}{3}

$\frac{1}{3}$ by

\frac{5}{5}

$\frac{5}{5}$ .

\frac{5}{3 \cdot 5} - \frac{4}{5} \cdot \frac{3}{3}

$\frac{5}{3 \cdot 5} - \frac{4}{5} \cdot \frac{3}{3}$

Step 3.2

Multiply

3

$3$ by

5

$5$ .

\frac{5}{15} - \frac{4}{5} \cdot \frac{3}{3}

$\frac{5}{15} - \frac{4}{5} \cdot \frac{3}{3}$

Step 3.3

Multiply

\frac{4}{5}

$\frac{4}{5}$ by

\frac{3}{3}

$\frac{3}{3}$ .

\frac{5}{15} - \frac{4 \cdot 3}{5 \cdot 3}

$\frac{5}{15} - \frac{4 \cdot 3}{5 \cdot 3}$

Step 3.4

Multiply

5

$5$ by

3

$3$ .

\frac{5}{15} - \frac{4 \cdot 3}{15}

$\frac{5}{15} - \frac{4 \cdot 3}{15}$

\frac{5}{15} - \frac{4 \cdot 3}{15}

$\frac{5}{15} - \frac{4 \cdot 3}{15}$

Step 4

Combine the numerators over the common denominator.

\frac{5 - 4 \cdot 3}{15}

$\frac{5 - 4 \cdot 3}{15}$

Step 5

Simplify the numerator.

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Step 5.1

Multiply

- 4

$- 4$ by

3

$3$ .

\frac{5 - 12}{15}

$\frac{5 - 12}{15}$

Step 5.2

Subtract

12

$12$ from

5

$5$ .

\frac{- 7}{15}

$\frac{- 7}{15}$

\frac{- 7}{15}

$\frac{- 7}{15}$

Step 6

Move the negative in front of the fraction.

- \frac{7}{15}

$- \frac{7}{15}$

Step 7

The result can be shown in multiple forms.

Exact Form:

- \frac{7}{15}

$- \frac{7}{15}$

Decimal Form:

- 0.4 ¯ 6

$- 0.4\overline{6}$