Algebra Examples

$8 \frac{1}{4} \div d = \frac{2}{11}$

Step 1

Simplify the left side.

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Step 1.1

Simplify $8 \frac{1}{4} \div d$ .

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Step 1.1.1

Convert $8 \frac{1}{4}$ to an improper fraction.

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Step 1.1.1.1

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

$(8 + \frac{1}{4}) \div d = \frac{2}{11}$

Step 1.1.1.2

Add $8$ and $\frac{1}{4}$ .

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Step 1.1.1.2.1

To write $8$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$(8 \cdot \frac{4}{4} + \frac{1}{4}) \div d = \frac{2}{11}$

Step 1.1.1.2.2

Combine $8$ and $\frac{4}{4}$ .

$(\frac{8 \cdot 4}{4} + \frac{1}{4}) \div d = \frac{2}{11}$

Step 1.1.1.2.3

Combine the numerators over the common denominator.

$\frac{8 \cdot 4 + 1}{4} \div d = \frac{2}{11}$

Step 1.1.1.2.4

Simplify the numerator.

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Step 1.1.1.2.4.1

Multiply $8$ by $4$ .

$\frac{32 + 1}{4} \div d = \frac{2}{11}$

Step 1.1.1.2.4.2

Add $32$ and $1$ .

$\frac{33}{4} \div d = \frac{2}{11}$

Step 1.1.2

Rewrite the division as a fraction.

$\frac{\frac{33}{4}}{d} = \frac{2}{11}$

Step 1.1.3

Multiply the numerator by the reciprocal of the denominator.

$\frac{33}{4} \cdot \frac{1}{d} = \frac{2}{11}$

Step 1.1.4

Multiply $\frac{33}{4}$ by $\frac{1}{d}$ .

$\frac{33}{4 d} = \frac{2}{11}$

Step 2

Find the LCD of the terms in the equation.

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Step 2.1

Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

$4 d, 11$

Step 2.2

Since $4 d, 11$ contains both numbers and variables, there are two steps to find the LCM. Find LCM for the numeric part $4, 11$ then find LCM for the variable part $d^{1}$ .

Step 2.3

The LCM is the smallest positive number that all of the numbers divide into evenly.

1. List the prime factors of each number.

2. Multiply each factor the greatest number of times it occurs in either number.

Step 2.4

$4$ has factors of $2$ and $2$ .

$2 \cdot 2$

Step 2.5

Since $11$ has no factors besides $1$ and $11$ .

$11$ is a prime number

Step 2.6

The LCM of $4, 11$ is the result of multiplying all prime factors the greatest number of times they occur in either number.

$2 \cdot 2 \cdot 11$

Step 2.7

Multiply $2 \cdot 2 \cdot 11$ .

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Step 2.7.1

Multiply $2$ by $2$ .

$4 \cdot 11$

Step 2.7.2

Multiply $4$ by $11$ .

$44$

Step 2.8

The factor for $d^{1}$ is $d$ itself.

$d^{1} = d$

$d$ occurs $1$ time.

Step 2.9

The LCM of $d^{1}$ is the result of multiplying all prime factors the greatest number of times they occur in either term.

$d$

Step 2.10

The LCM for $4 d, 11$ is the numeric part $44$ multiplied by the variable part.

$44 d$

Step 3

Multiply each term in $\frac{33}{4 d} = \frac{2}{11}$ by $44 d$ to eliminate the fractions.

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Step 3.1

Multiply each term in $\frac{33}{4 d} = \frac{2}{11}$ by $44 d$ .

$\frac{33}{4 d} (44 d) = \frac{2}{11} (44 d)$

Step 3.2

Simplify the left side.

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Step 3.2.1

Rewrite using the commutative property of multiplication.

$44 \frac{33}{4 d} d = \frac{2}{11} (44 d)$

Step 3.2.2

Cancel the common factor of $4$ .

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Step 3.2.2.1

Factor $4$ out of $44$ .

$4 (11) \frac{33}{4 d} d = \frac{2}{11} (44 d)$

Step 3.2.2.2

Factor $4$ out of $4 d$ .

$4 (11) \frac{33}{4 (d)} d = \frac{2}{11} (44 d)$

Step 3.2.2.3

Cancel the common factor.

$4 \cdot 11 \frac{33}{4 d} d = \frac{2}{11} (44 d)$

Step 3.2.2.4

Rewrite the expression.

$11 \frac{33}{d} d = \frac{2}{11} (44 d)$

Step 3.2.3

Combine $11$ and $\frac{33}{d}$ .

$\frac{11 \cdot 33}{d} d = \frac{2}{11} (44 d)$

Step 3.2.4

Multiply $11$ by $33$ .

$\frac{363}{d} d = \frac{2}{11} (44 d)$

Step 3.2.5

Cancel the common factor of $d$ .

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Step 3.2.5.1

Cancel the common factor.

$\frac{363}{d} d = \frac{2}{11} (44 d)$

Step 3.2.5.2

Rewrite the expression.

$363 = \frac{2}{11} (44 d)$

Step 3.3

Simplify the right side.

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Step 3.3.1

Cancel the common factor of $11$ .

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Step 3.3.1.1

Factor $11$ out of $44 d$ .

$363 = \frac{2}{11} (11 (4 d))$

Step 3.3.1.2

Cancel the common factor.

$363 = \frac{2}{11} (11 (4 d))$

Step 3.3.1.3

Rewrite the expression.

$363 = 2 (4 d)$

Step 3.3.2

Multiply $4$ by $2$ .

$363 = 8 d$

Step 4

Solve the equation.

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Step 4.1

Rewrite the equation as $8 d = 363$ .

$8 d = 363$

Step 4.2

Divide each term in $8 d = 363$ by $8$ and simplify.

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Step 4.2.1

Divide each term in $8 d = 363$ by $8$ .

$\frac{8 d}{8} = \frac{363}{8}$

Step 4.2.2

Simplify the left side.

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Step 4.2.2.1

Cancel the common factor of $8$ .

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Step 4.2.2.1.1

Cancel the common factor.

$\frac{8 d}{8} = \frac{363}{8}$

Step 4.2.2.1.2

Divide $d$ by $1$ .

$d = \frac{363}{8}$

Step 5

The result can be shown in multiple forms.

Exact Form:

$d = \frac{363}{8}$

Decimal Form:

$d = 45.375$

Mixed Number Form:

$d = 45 \frac{3}{8}$