Pre-Algebra Examples

$3 \frac{7}{8}$

Step 1

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

$3 + \frac{7}{8}$

Step 2

Add $3$ and $\frac{7}{8}$ .

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Step 2.1

To write $3$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

$3 \cdot \frac{8}{8} + \frac{7}{8}$

Step 2.2

Combine $3$ and $\frac{8}{8}$ .

$\frac{3 \cdot 8}{8} + \frac{7}{8}$

Step 2.3

Combine the numerators over the common denominator.

$\frac{3 \cdot 8 + 7}{8}$

Step 2.4

Simplify the numerator.

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Step 2.4.1

Multiply $3$ by $8$ .

$\frac{24 + 7}{8}$

Step 2.4.2

Add $24$ and $7$ .

$\frac{31}{8}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{31}{8}$

Decimal Form:

$3.875$

Mixed Number Form:

$3 \frac{7}{8}$