Solve the Fraction Division: 5/9 ÷ 7/18 Step by Step

Fraction Division with Reciprocal Method

Solve the following:

59:718= \frac{5}{9}:\frac{7}{18}=

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following:

59:718= \frac{5}{9}:\frac{7}{18}=

2

Step-by-step solution

To solve 59÷718 \frac{5}{9} \div \frac{7}{18} , we will proceed with the following steps:

  • Step 1: Identify the dividend and divisor: 59 \frac{5}{9} and 718 \frac{7}{18} .
  • Step 2: Find the reciprocal of the divisor. The reciprocal of 718 \frac{7}{18} is 187 \frac{18}{7} .
  • Step 3: Multiply the dividend by the reciprocal of the divisor: 59×187. \frac{5}{9} \times \frac{18}{7}.
  • Step 4: Multiply the numerators: 5×18=90 5 \times 18 = 90 .
  • Step 5: Multiply the denominators: 9×7=63 9 \times 7 = 63 .
  • Step 6: The resulting fraction from the multiplication is 9063. \frac{90}{63}.
  • Step 7: Simplify 9063 \frac{90}{63} . The greatest common divisor (GCD) of 90 and 63 is 9. Divide both the numerator and the denominator by 9: 90÷963÷9=107. \frac{90 \div 9}{63 \div 9} = \frac{10}{7}.
  • Step 8: Convert 107\frac{10}{7} into a mixed number. Since 1010 divided by 77 is 11 with a remainder of 33, this is 137. 1\frac{3}{7}.

So, the solution to the problem is 137 1\frac{3}{7} .

3

Final Answer

137 1\frac{3}{7}

Key Points to Remember

Essential concepts to master this topic
  • Rule: When dividing fractions, multiply by the reciprocal instead
  • Technique: 59÷718=59×187=9063 \frac{5}{9} \div \frac{7}{18} = \frac{5}{9} \times \frac{18}{7} = \frac{90}{63}
  • Check: Simplify to lowest terms and convert to mixed number: 137 1\frac{3}{7}

Common Mistakes

Avoid these frequent errors
  • Dividing numerators and denominators directly
    Don't divide 59÷718 \frac{5}{9} \div \frac{7}{18} by doing 5÷7 and 9÷18 = wrong answer! This ignores the proper fraction division rule and creates meaningless calculations. Always flip the second fraction and multiply instead.

Practice Quiz

Test your knowledge with interactive questions

\( \frac{1}{3}+\frac{1}{4}= \)

FAQ

Everything you need to know about this question

Why do I flip the second fraction when dividing?

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Division by a fraction is the same as multiplication by its reciprocal. Think of it this way: dividing by 718 \frac{7}{18} asks "how many 718 \frac{7}{18} 's fit into 59 \frac{5}{9} ?" which equals multiplying by 187 \frac{18}{7} .

How do I find the reciprocal of a fraction?

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Simply flip the fraction upside down! The reciprocal of 718 \frac{7}{18} becomes 187 \frac{18}{7} . The numerator and denominator switch places.

Do I need to simplify before or after multiplying?

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It's usually easier to multiply first, then simplify. In this problem: 5×189×7=9063 \frac{5 \times 18}{9 \times 7} = \frac{90}{63} , then divide both by GCD of 9 to get 107 \frac{10}{7} .

When should I convert to a mixed number?

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Convert to a mixed number when the numerator is larger than the denominator (improper fraction). Since 10 > 7, we get 137 1\frac{3}{7} because 10 ÷ 7 = 1 remainder 3.

What if I get a whole number as my answer?

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That's perfectly normal! If your final fraction has no remainder (like 147=2 \frac{14}{7} = 2 ), then your answer is simply that whole number.

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