Solve Mixed Number Division: 2⅙ Divided by ⅔

Mixed Number Division with Fraction Reciprocals

216:23= 2\frac{1}{6}:\frac{2}{3}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Convert mixed number to improper fraction
00:08 Calculate the numerator, substitute back in the exercise
00:16 Convert division to multiplication by reciprocal
00:29 Remember to multiply numerator by numerator and denominator by denominator
00:35 Calculate the multiplications
00:39 Now convert to mixed number
00:43 Break down 39 into 36 plus 3
00:50 Break down the fraction into whole number and remainder
00:57 Convert whole fraction to whole number, and combine into mixed number
01:02 Simplify what's possible
01:10 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

216:23= 2\frac{1}{6}:\frac{2}{3}=

2

Step-by-step solution

To solve the problem of dividing the mixed number 216 2\frac{1}{6} by the fraction 23\frac{2}{3}, follow these steps:

  • Step 1: Convert the mixed number 216 2\frac{1}{6} into an improper fraction.
    This is done by multiplying the whole number 2 by the denominator 6, then adding the numerator 1. Therefore, 2×6+1=13 2 \times 6 + 1 = 13 . The improper fraction is 136\frac{13}{6}.
  • Step 2: Convert the division into multiplication by using the reciprocal of 23\frac{2}{3}.
    The reciprocal of 23\frac{2}{3} is 32\frac{3}{2}.
  • Step 3: Multiply the improper fraction 136\frac{13}{6} by the reciprocal 32\frac{3}{2}.
    Performing the multiplication gives 136×32=13×36×2=3912\frac{13}{6} \times \frac{3}{2} = \frac{13 \times 3}{6 \times 2} = \frac{39}{12}.
  • Step 4: Simplify the resulting fraction 3912\frac{39}{12}.
    This fraction simplifies by dividing both the numerator and denominator by their greatest common divisor, which is 3. Thus 39÷312÷3=134\frac{39 \div 3}{12 \div 3} = \frac{13}{4}.
  • Step 5: Convert the improper fraction 134\frac{13}{4} back to a mixed number.
    By dividing 13 by 4, we get 3 with a remainder of 1. This results in the mixed number 3143\frac{1}{4}.

Therefore, the solution to the problem is 314 3\frac{1}{4} .

3

Final Answer

314 3\frac{1}{4}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Convert mixed numbers to improper fractions before dividing
  • Technique: Multiply by reciprocal: 136×32=3912 \frac{13}{6} \times \frac{3}{2} = \frac{39}{12}
  • Check: Convert final answer back to mixed number form: 134=314 \frac{13}{4} = 3\frac{1}{4}

Common Mistakes

Avoid these frequent errors
  • Dividing the whole number and fraction parts separately
    Don't divide 2 by 23 \frac{2}{3} and then 16 \frac{1}{6} by 23 \frac{2}{3} = wrong method! This treats the mixed number as separate parts instead of one value. Always convert the entire mixed number to an improper fraction first.

Practice Quiz

Test your knowledge with interactive questions

\( 3\times\frac{8}{12}= \)

FAQ

Everything you need to know about this question

Why can't I just divide 2 by 2/3 and then 1/6 by 2/3 separately?

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Because 216 2\frac{1}{6} is one complete number, not two separate parts! Dividing parts separately would be like saying 25 ÷ 5 = (20 ÷ 5) + (5 ÷ 5) = 4 + 1 = 5, which is wrong since 25 ÷ 5 = 5.

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

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Use this simple formula: Multiply the whole number by the denominator, then add the numerator. For 216 2\frac{1}{6} : (2 × 6) + 1 = 13, so you get 136 \frac{13}{6} .

What's the reciprocal and why do I flip it?

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The reciprocal flips the numerator and denominator. Division by a fraction is the same as multiplication by its reciprocal. So ÷23 ÷ \frac{2}{3} becomes ×32 × \frac{3}{2} .

Do I always need to simplify my final fraction?

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Yes! Always simplify by finding the greatest common divisor (GCD). For 3912 \frac{39}{12} , both 39 and 12 divide by 3, giving us 134 \frac{13}{4} .

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

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Divide the numerator by the denominator. For 134 \frac{13}{4} : 13 ÷ 4 = 3 remainder 1, so the answer is 314 3\frac{1}{4} .

Can I check my answer somehow?

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Absolutely! Multiply your answer by the original divisor. Check: 314×23 3\frac{1}{4} × \frac{2}{3} should equal 216 2\frac{1}{6} . Convert and multiply to verify!

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