Solve: 3/5 Divided by 2⅓ - Mixed Number Division

Fraction Division with Mixed Number Conversion

35:213= \frac{3}{5}:2\frac{1}{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 from a number and fraction to a fraction
00:20 Division equals multiplication by the reciprocal
00:35 Make sure to multiply numerator by numerator and denominator by denominator
00:46 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

35:213= \frac{3}{5}:2\frac{1}{3}=

2

Step-by-step solution

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

  • Step 1: Convert the mixed number 2132\frac{1}{3} into an improper fraction.
  • Step 2: Take the reciprocal of this improper fraction.
  • Step 3: Multiply 35\frac{3}{5} by this reciprocal.
  • Step 4: Simplify the resulting fraction if needed.

Now, let's work through each step:

Step 1: Convert 2132\frac{1}{3} to an improper fraction.
A mixed number like 2132\frac{1}{3} means 2+132 + \frac{1}{3}. To convert it, multiply the whole number part by the denominator of the fractional part and add the numerator: 2×3+1=6+1=72 \times 3 + 1 = 6 + 1 = 7. Thus, the improper fraction is 73\frac{7}{3}.

Step 2: Find the reciprocal of 73\frac{7}{3}.
The reciprocal of 73\frac{7}{3} is 37\frac{3}{7}.

Step 3: Multiply 35\frac{3}{5} by 37\frac{3}{7}.
When multiplying fractions, multiply numerators and denominators: 35×37=3×35×7=935\frac{3}{5} \times \frac{3}{7} = \frac{3 \times 3}{5 \times 7} = \frac{9}{35}.

Step 4: Simplify 935\frac{9}{35} if necessary.
The fraction 935\frac{9}{35} is already in its simplest form, as 9 and 35 have no common factors other than 1.

Therefore, the solution to the problem is 935\frac{9}{35}.

3

Final Answer

935 \frac{9}{35}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Convert mixed numbers to improper fractions before dividing
  • Technique: Multiply by reciprocal: 35×37=935 \frac{3}{5} \times \frac{3}{7} = \frac{9}{35}
  • Check: Verify 935×73=35 \frac{9}{35} \times \frac{7}{3} = \frac{3}{5} using inverse operation ✓

Common Mistakes

Avoid these frequent errors
  • Trying to divide without converting mixed numbers first
    Don't attempt to divide 35÷213 \frac{3}{5} \div 2\frac{1}{3} directly = impossible calculation! You can't divide by a mixed number until it's an improper fraction. Always convert 213 2\frac{1}{3} to 73 \frac{7}{3} first, then multiply by its reciprocal.

Practice Quiz

Test your knowledge with interactive questions

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

FAQ

Everything you need to know about this question

Why do I need to convert the mixed number first?

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You can only divide by proper or improper fractions, not mixed numbers! Converting 213 2\frac{1}{3} to 73 \frac{7}{3} gives you something you can work with mathematically.

How do I remember the formula for converting mixed numbers?

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Use the formula: Whole × Denominator + Numerator. For 213 2\frac{1}{3} : multiply 2 × 3 = 6, then add 1 = 7, so it becomes 73 \frac{7}{3} .

Why do I multiply by the reciprocal instead of dividing?

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Dividing by a fraction is the same thing as multiplying by its reciprocal! It's much easier to multiply 35×37 \frac{3}{5} \times \frac{3}{7} than to divide 35÷73 \frac{3}{5} \div \frac{7}{3} .

How do I know if my final fraction can be simplified?

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Check if the numerator and denominator share any common factors. Since 9 = 3 × 3 and 35 = 5 × 7, they don't share any factors, so 935 \frac{9}{35} is already simplified!

Can I check my answer by working backwards?

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Yes! Multiply your answer by the original divisor: 935×73=63105=35 \frac{9}{35} \times \frac{7}{3} = \frac{63}{105} = \frac{3}{5} . If you get the original dividend, you're correct!

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