Solve Fraction Division: 5/8 ÷ 1¾ Step by Step

Fraction Division with Mixed Numbers

58:134= \frac{5}{8}:1\frac{3}{4}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:04 Convert a number and fraction to fraction
00:20 Division equals multiplication by reciprocal
00:30 Make sure to multiply numerator by numerator and denominator by denominator
00:48 Reduce to 4
00:52 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

58:134= \frac{5}{8}:1\frac{3}{4}=

2

Step-by-step solution

To solve the problem, we'll follow these steps:

  • Step 1: Convert the mixed number, 134 1 \frac{3}{4} , into an improper fraction.
  • Step 2: Rewrite the division as a multiplication by the reciprocal of the improper fraction.
  • Step 3: Perform the multiplication and simplify the resulting fraction.

Now, let's work through each step:
Step 1: Convert the mixed number. 134 1 \frac{3}{4} can be converted as follows:

The whole number 11 times the denominator 44 plus the numerator 33 gives 77.
Thus, 134=74 1 \frac{3}{4} = \frac{7}{4} .

Step 2: Divide 58 \frac{5}{8} by 74 \frac{7}{4} by multiplying by its reciprocal:
58÷74=58×47 \frac{5}{8} \div \frac{7}{4} = \frac{5}{8} \times \frac{4}{7} .

Step 3: Multiply across the numerators and the denominators:
5×48×7=2056\frac{5 \times 4}{8 \times 7} = \frac{20}{56}.

Simplify 2056\frac{20}{56} by finding the greatest common divisor (GCD), which is 44:
2056=20÷456÷4=514\frac{20}{56} = \frac{20 \div 4}{56 \div 4} = \frac{5}{14}.

Therefore, the solution to the problem is 514 \frac{5}{14} .

3

Final Answer

514 \frac{5}{14}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Convert mixed numbers to improper fractions before dividing
  • Technique: Multiply by reciprocal: 58×47=2056 \frac{5}{8} \times \frac{4}{7} = \frac{20}{56}
  • Check: Simplify final answer by dividing by GCD: 2056=514 \frac{20}{56} = \frac{5}{14}

Common Mistakes

Avoid these frequent errors
  • Dividing directly without converting mixed numbers
    Don't try to divide 58 \frac{5}{8} by 134 1\frac{3}{4} directly = impossible calculation! You can't divide by a mixed number format. Always convert mixed numbers to improper fractions first: 134=74 1\frac{3}{4} = \frac{7}{4} .

Practice Quiz

Test your knowledge with interactive questions

\( \frac{1}{2}:3= \)\( \)\( \)\( \)

FAQ

Everything you need to know about this question

How do I convert a mixed number to an improper fraction?

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Multiply the whole number by the denominator, then add the numerator. For 134 1\frac{3}{4} : (1 × 4) + 3 = 7, so it becomes 74 \frac{7}{4} .

Why do I flip the second fraction when dividing?

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Division by a fraction is the same as multiplying by its reciprocal. So ÷74 \div \frac{7}{4} becomes ×47 \times \frac{4}{7} . This makes the calculation much easier!

How do I find the GCD to simplify my answer?

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List the factors of both numbers and find the largest one they share. For 2056 \frac{20}{56} : factors of 20 are 1,2,4,5,10,20 and factors of 56 are 1,2,4,7,8,14,28,56. The GCD is 4.

Can I leave my answer as an improper fraction?

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Yes! 514 \frac{5}{14} is already in simplest form and is the correct way to express this answer. Converting to a mixed number would make it 0514 0\frac{5}{14} , which is unnecessary.

What if I forgot to simplify my final answer?

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Always check if your answer can be simplified! Unsimplified answers are often marked as incorrect even if your calculation was right. Divide both numerator and denominator by their GCD.

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