Basic Math Examples

3 \frac{1}{4} - 2 \frac{3}{8}

$3 \frac{1}{4} - 2 \frac{3}{8}$

Step 1

Convert

3 \frac{1}{4}

$3 \frac{1}{4}$ to an improper fraction.

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Step 1.1

A mixed number is an addition of its whole and fractional parts.

3 + \frac{1}{4} - 2 \frac{3}{8}

$3 + \frac{1}{4} - 2 \frac{3}{8}$

Step 1.2

Add

3

$3$ and

\frac{1}{4}

$\frac{1}{4}$ .

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Step 1.2.1

To write

3

$3$ as a fraction with a common denominator, multiply by

\frac{4}{4}

$\frac{4}{4}$ .

3 \cdot \frac{4}{4} + \frac{1}{4} - 2 \frac{3}{8}

$3 \cdot \frac{4}{4} + \frac{1}{4} - 2 \frac{3}{8}$

Step 1.2.2

Combine

3

$3$ and

\frac{4}{4}

$\frac{4}{4}$ .

\frac{3 \cdot 4}{4} + \frac{1}{4} - 2 \frac{3}{8}

$\frac{3 \cdot 4}{4} + \frac{1}{4} - 2 \frac{3}{8}$

Step 1.2.3

Combine the numerators over the common denominator.

\frac{3 \cdot 4 + 1}{4} - 2 \frac{3}{8}

$\frac{3 \cdot 4 + 1}{4} - 2 \frac{3}{8}$

Step 1.2.4

Simplify the numerator.

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Step 1.2.4.1

Multiply

3

$3$ by

4

$4$ .

\frac{12 + 1}{4} - 2 \frac{3}{8}

$\frac{12 + 1}{4} - 2 \frac{3}{8}$

Step 1.2.4.2

Add

12

$12$ and

1

$1$ .

\frac{13}{4} - 2 \frac{3}{8}

$\frac{13}{4} - 2 \frac{3}{8}$

\frac{13}{4} - 2 \frac{3}{8}

$\frac{13}{4} - 2 \frac{3}{8}$

\frac{13}{4} - 2 \frac{3}{8}

$\frac{13}{4} - 2 \frac{3}{8}$

\frac{13}{4} - 2 \frac{3}{8}

$\frac{13}{4} - 2 \frac{3}{8}$

Step 2

Convert

2 \frac{3}{8}

$2 \frac{3}{8}$ to an improper fraction.

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Step 2.1

A mixed number is an addition of its whole and fractional parts.

\frac{13}{4} - (2 + \frac{3}{8})

$\frac{13}{4} - (2 + \frac{3}{8})$

Step 2.2

Add

2

$2$ and

\frac{3}{8}

$\frac{3}{8}$ .

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Step 2.2.1

To write

2

$2$ as a fraction with a common denominator, multiply by

\frac{8}{8}

$\frac{8}{8}$ .

\frac{13}{4} - (2 \cdot \frac{8}{8} + \frac{3}{8})

$\frac{13}{4} - (2 \cdot \frac{8}{8} + \frac{3}{8})$

Step 2.2.2

Combine

2

$2$ and

\frac{8}{8}

$\frac{8}{8}$ .

\frac{13}{4} - (\frac{2 \cdot 8}{8} + \frac{3}{8})

$\frac{13}{4} - (\frac{2 \cdot 8}{8} + \frac{3}{8})$

Step 2.2.3

Combine the numerators over the common denominator.

\frac{13}{4} - \frac{2 \cdot 8 + 3}{8}

$\frac{13}{4} - \frac{2 \cdot 8 + 3}{8}$

Step 2.2.4

Simplify the numerator.

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Step 2.2.4.1

Multiply

2

$2$ by

8

$8$ .

\frac{13}{4} - \frac{16 + 3}{8}

$\frac{13}{4} - \frac{16 + 3}{8}$

Step 2.2.4.2

Add

16

$16$ and

3

$3$ .

\frac{13}{4} - \frac{19}{8}

$\frac{13}{4} - \frac{19}{8}$

\frac{13}{4} - \frac{19}{8}

$\frac{13}{4} - \frac{19}{8}$

\frac{13}{4} - \frac{19}{8}

$\frac{13}{4} - \frac{19}{8}$

\frac{13}{4} - \frac{19}{8}

$\frac{13}{4} - \frac{19}{8}$

Step 3

To write

\frac{13}{4}

$\frac{13}{4}$ as a fraction with a common denominator, multiply by

\frac{2}{2}

$\frac{2}{2}$ .

\frac{13}{4} \cdot \frac{2}{2} - \frac{19}{8}

$\frac{13}{4} \cdot \frac{2}{2} - \frac{19}{8}$

Step 4

Write each expression with a common denominator of

8

$8$ , by multiplying each by an appropriate factor of

1

$1$ .

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Step 4.1

Multiply

\frac{13}{4}

$\frac{13}{4}$ by

\frac{2}{2}

$\frac{2}{2}$ .

\frac{13 \cdot 2}{4 \cdot 2} - \frac{19}{8}

$\frac{13 \cdot 2}{4 \cdot 2} - \frac{19}{8}$

Step 4.2

Multiply

4

$4$ by

2

$2$ .

\frac{13 \cdot 2}{8} - \frac{19}{8}

$\frac{13 \cdot 2}{8} - \frac{19}{8}$

\frac{13 \cdot 2}{8} - \frac{19}{8}

$\frac{13 \cdot 2}{8} - \frac{19}{8}$

Step 5

Combine the numerators over the common denominator.

\frac{13 \cdot 2 - 19}{8}

$\frac{13 \cdot 2 - 19}{8}$

Step 6

Simplify the numerator.

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Step 6.1

Multiply

13

$13$ by

2

$2$ .

\frac{26 - 19}{8}

$\frac{26 - 19}{8}$

Step 6.2

Subtract

19

$19$ from

26

$26$ .

\frac{7}{8}

$\frac{7}{8}$

\frac{7}{8}

$\frac{7}{8}$

Step 7

The result can be shown in multiple forms.

Exact Form:

\frac{7}{8}

$\frac{7}{8}$

Decimal Form:

0.875

$0.875$