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Question

The value of $\frac{5}{3} + \left( \frac{1}{1 + \frac{4}{9}} \right) - \frac{2}{5}$ is

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
$\frac{382}{195}$

Evaluate Fraction Arithmetic Expression

The problem asks for the value of the expression:

$ \frac{5}{3} + \left( \frac{1}{1 + \frac{4}{9}} \right) - \frac{2}{5} $

Step-by-Step Calculation

  1. Simplify the term in parentheses:

    First, calculate the denominator inside the parentheses:

    $ 1 + \frac{4}{9} = \frac{9}{9} + \frac{4}{9} = \frac{13}{9} $

    Now, calculate the entire term in parentheses:

    $ \frac{1}{\frac{13}{9}} = \frac{9}{13} $
  2. Substitute back into the original expression:

    The expression becomes:

    $ \frac{5}{3} + \frac{9}{13} - \frac{2}{5} $
  3. Find the Common Denominator:

    The denominators are 3, 13, and 5. The least common multiple (LCM) of 3, 13, and 5 is:

    $ \text{LCM}(3, 13, 5) = 3 \times 13 \times 5 = 195 $
  4. Convert Fractions to Common Denominator:
    • $ \frac{5}{3} = \frac{5 \times 65}{3 \times 65} = \frac{325}{195} $
    • $ \frac{9}{13} = \frac{9 \times 15}{13 \times 15} = \frac{135}{195} $
    • $ \frac{2}{5} = \frac{2 \times 39}{5 \times 39} = \frac{78}{195} $
  5. Perform Addition and Subtraction:

    Combine the fractions using the common denominator:

    $ \frac{325}{195} + \frac{135}{195} - \frac{78}{195} = \frac{325 + 135 - 78}{195} $

    Calculate the numerator:

    $ \frac{460 - 78}{195} = \frac{382}{195} $

Final Value

The value of the given expression is $\frac{382}{195}$.

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Important Questions from Simplification

  1. Simplify

    6 × {28 ÷ 84 × {36 × 49 ÷ (6 × 7)}}.

  2. Simplify.

  3. A bag contains ₹5, 2 and 1 coins in the ratio of 3 : 4 : 5. The total value of all the coins is ₹2,100. How many coins of ₹5 are there in the bag?
  4. \(\frac{6}{2}\times\frac{10}{2}\div\frac{6}{2}\times6^2+5\times4=?\)
  5. Find the value of 2.\(\overline {36} \) + 3.\(\overline {21} \) - 1.\(\overline {05} \)
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