Basic Math Examples

$15$ , $208 \div 771$

Step 1

Rewrite the division as a fraction.

$15, \frac{208}{771}$

Step 2

The mean of a set of numbers is the sum divided by the number of terms.

$\frac{15 + \frac{208}{771}}{2}$

Step 3

Simplify the numerator.

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Step 3.1

To write $15$ as a fraction with a common denominator, multiply by $\frac{771}{771}$ .

$\frac{15 \cdot \frac{771}{771} + \frac{208}{771}}{2}$

Step 3.2

Combine $15$ and $\frac{771}{771}$ .

$\frac{\frac{15 \cdot 771}{771} + \frac{208}{771}}{2}$

Step 3.3

Combine the numerators over the common denominator.

$\frac{\frac{15 \cdot 771 + 208}{771}}{2}$

Step 3.4

Simplify the numerator.

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Step 3.4.1

Multiply $15$ by $771$ .

$\frac{\frac{11565 + 208}{771}}{2}$

Step 3.4.2

Add $11565$ and $208$ .

$\frac{\frac{11773}{771}}{2}$

Step 4

Multiply the numerator by the reciprocal of the denominator.

$\frac{11773}{771} \cdot \frac{1}{2}$

Step 5

Multiply $\frac{11773}{771} \cdot \frac{1}{2}$ .

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Step 5.1

Multiply $\frac{11773}{771}$ by $\frac{1}{2}$ .

$\frac{11773}{771 \cdot 2}$

Step 5.2

Multiply $771$ by $2$ .

$\frac{11773}{1542}$

Step 6

Divide.

$7.63488975$

Step 7

The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.

$7.6$