Solve the Nested Fraction Division: 4/5 ÷ (2/3 ÷ (4 ÷ 3/2))

Nested Fraction Division with Multiple Operations

45:(23:(4:32))=? \frac{4}{5}:(\frac{2}{3}:(4:\frac{3}{2}))=\text{?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Always solve parentheses first, the rule also applies within parentheses
00:06 Let's start with the innermost parentheses
00:09 Division is also multiplication by the reciprocal
00:22 Let's move the multiplication to the numerator
00:32 Division is also multiplication by the reciprocal
00:44 Multiply numerator by numerator and denominator by denominator
00:50 Let's reduce what we can
00:57 Division is also multiplication by the reciprocal
01:07 Let's divide 16 by 15 plus 1
01:14 Let's break down the fraction into a whole number and remainder
01:19 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

45:(23:(4:32))=? \frac{4}{5}:(\frac{2}{3}:(4:\frac{3}{2}))=\text{?}

2

Step-by-step solution

We convert the exercise with the innermost parentheses into a multiplication exercise, inverting the numerator and the denominator:

45:(23:(4×23))= \frac{4}{5}:(\frac{2}{3}:(4\times\frac{2}{3}))=

We add the 4 to the numerator of the fraction in the multiplication exercise:

45:(23:(4×23))= \frac{4}{5}:(\frac{2}{3}:(\frac{4\times2}{3}))=

Again, we convert the exercise with the innermost parentheses into a multiplication exercise, inverting the numerator and the denominator:

45:(23×34×2))= \frac{4}{5}:(\frac{2}{3}\times\frac{3}{4\times2}))=

We convert the multiplication exercise between fractions into a single exercise, and we obtain:

45:(2×33×4×2)= \frac{4}{5}:(\frac{2\times3}{3\times4\times2})=

We simplify the 2 and the 3 in the numerator and denominator, and we obtain:

45:(14)= \frac{4}{5}:(\frac{1}{4})=

We convert the exercise with the secondary parentheses into a multiplication exercise, inverting the numerator and the denominator:

45×41=4×45×1=165 \frac{4}{5}\times\frac{4}{1}=\frac{4\times4}{5\times1}=\frac{16}{5}

We convert the numerator of the fraction into a sum exercise:

15+15= \frac{15+1}{5}=

We separate into a sum exercise between fractions:

155+15= \frac{15}{5}+\frac{1}{5}=

We obtain:

3+15=315 3+\frac{1}{5}=3\frac{1}{5}

3

Final Answer

315 3\frac{1}{5}

Key Points to Remember

Essential concepts to master this topic
  • Order of Operations: Always work from innermost parentheses outward
  • Division Technique: Convert 4÷32 4 ÷ \frac{3}{2} to 4×23=83 4 × \frac{2}{3} = \frac{8}{3}
  • Verification: Check by working backwards: 315×14×38=45 3\frac{1}{5} × \frac{1}{4} × \frac{3}{8} = \frac{4}{5}

Common Mistakes

Avoid these frequent errors
  • Working from left to right instead of inside out
    Don't solve 45÷23 \frac{4}{5} ÷ \frac{2}{3} first = wrong answer of 65 \frac{6}{5} ! Nested parentheses create a specific order that must be followed. Always start with the innermost parentheses and work outward systematically.

Practice Quiz

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\( 70:(14\times5)= \)

FAQ

Everything you need to know about this question

Why do I start with the innermost parentheses first?

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The order of operations requires you to resolve parentheses from the inside out. Think of it like peeling an onion - you must remove each layer before getting to the next one!

How do I convert division by a fraction?

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Division by a fraction means multiply by its reciprocal. So 4÷32 4 ÷ \frac{3}{2} becomes 4×23=83 4 × \frac{2}{3} = \frac{8}{3} .

What if I get confused by all the parentheses?

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Work one step at a time! Write out each step clearly and only tackle the innermost parentheses. Once you solve that part, rewrite the entire expression with your answer substituted in.

How do I know if 315 3\frac{1}{5} is really the right answer?

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Convert to improper fraction: 315=165 3\frac{1}{5} = \frac{16}{5} . Then work backwards through each step to verify you get 45 \frac{4}{5} at the start.

Can I use a calculator for this problem?

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While calculators help with arithmetic, it's important to understand the process first. Practice by hand so you truly grasp how nested operations work step-by-step.

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