Basic Math Examples

$3 \frac{2}{3} - 1 \frac{4}{5}$

Step 1

Convert

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

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Step 1.1

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

$3 + \frac{2}{3} - 1 \frac{4}{5}$

Step 1.2

Add

$3$ and

$\frac{2}{3}$ .

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Step 1.2.1

To write

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

$\frac{3}{3}$ .

$3 \cdot \frac{3}{3} + \frac{2}{3} - 1 \frac{4}{5}$

Step 1.2.2

Combine

$3$ and

$\frac{3}{3}$ .

$\frac{3 \cdot 3}{3} + \frac{2}{3} - 1 \frac{4}{5}$

Step 1.2.3

Combine the numerators over the common denominator.

$\frac{3 \cdot 3 + 2}{3} - 1 \frac{4}{5}$

Step 1.2.4

Simplify the numerator.

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Step 1.2.4.1

Multiply

$3$ by

$3$ .

$\frac{9 + 2}{3} - 1 \frac{4}{5}$

Step 1.2.4.2

Add

$9$ and

$2$ .

$\frac{11}{3} - 1 \frac{4}{5}$

Step 2

Convert

$1 \frac{4}{5}$ to an improper fraction.

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Step 2.1

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

$\frac{11}{3} - (1 + \frac{4}{5})$

Step 2.2

Add

$1$ and

$\frac{4}{5}$ .

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Step 2.2.1

Write

$1$ as a fraction with a common denominator.

$\frac{11}{3} - (\frac{5}{5} + \frac{4}{5})$

Step 2.2.2

Combine the numerators over the common denominator.

$\frac{11}{3} - \frac{5 + 4}{5}$

Step 2.2.3

Add

$5$ and

$4$ .

$\frac{11}{3} - \frac{9}{5}$

Step 3

To write

$\frac{11}{3}$ as a fraction with a common denominator, multiply by

$\frac{5}{5}$ .

$\frac{11}{3} \cdot \frac{5}{5} - \frac{9}{5}$

Step 4

To write

$- \frac{9}{5}$ as a fraction with a common denominator, multiply by

$\frac{3}{3}$ .

$\frac{11}{3} \cdot \frac{5}{5} - \frac{9}{5} \cdot \frac{3}{3}$

Step 5

Write each expression with a common denominator of

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

$1$ .

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Step 5.1

Multiply

$\frac{11}{3}$ by

$\frac{5}{5}$ .

$\frac{11 \cdot 5}{3 \cdot 5} - \frac{9}{5} \cdot \frac{3}{3}$

Step 5.2

Multiply

$3$ by

$5$ .

$\frac{11 \cdot 5}{15} - \frac{9}{5} \cdot \frac{3}{3}$

Step 5.3

Multiply

$\frac{9}{5}$ by

$\frac{3}{3}$ .

$\frac{11 \cdot 5}{15} - \frac{9 \cdot 3}{5 \cdot 3}$

Step 5.4

Multiply

$5$ by

$3$ .

$\frac{11 \cdot 5}{15} - \frac{9 \cdot 3}{15}$

Step 6

Combine the numerators over the common denominator.

$\frac{11 \cdot 5 - 9 \cdot 3}{15}$

Step 7

Simplify the numerator.

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Step 7.1

Multiply

$11$ by

$5$ .

$\frac{55 - 9 \cdot 3}{15}$

Step 7.2

Multiply

$- 9$ by

$3$ .

$\frac{55 - 27}{15}$

Step 7.3

Subtract

$27$ from

$55$ .

$\frac{28}{15}$

Step 8

The result can be shown in multiple forms.

Exact Form:

$\frac{28}{15}$

Decimal Form:

$1.8\overline{6}$

Mixed Number Form:

$1 \frac{13}{15}$