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

Question

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

Video Solution

Solution Steps

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 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}

Answer

315 3\frac{1}{5}