Express Decimals into Fractions (p/q)

Express Each of the Following Decimals in the Form p/q

Question: Express each of the following decimals in the form \( \frac{p}{q} \):

  • (i) 0.39
  • (ii) 0.750
  • (iii) 2.15

Solution:

(i) Convert 0.39 into p/q form

\[ 0.39 = \frac{39}{100} \]

This is already in simplest form.

Answer: \( \frac{39}{100} \)


(ii) Convert 0.750 into p/q form

\[ 0.750 = \frac{750}{1000} \]

Simplify by dividing numerator and denominator by 250:

\[ \frac{750}{1000} = \frac{3}{4} \]

Answer: \( \frac{3}{4} \)


(iii) Convert 2.15 into p/q form

\[ 2.15 = \frac{215}{100} \]

Simplify by dividing by 5:

\[ \frac{215}{100} = \frac{43}{20} \]

Answer: \( \frac{43}{20} \)


Final Answers:

  • \(0.39 = \frac{39}{100}\)
  • \(0.750 = \frac{3}{4}\)
  • \(2.15 = \frac{43}{20}\)

Concept Used:

To convert a decimal into a fraction, write it as a fraction with denominator as a power of 10 and simplify it. :contentReference[oaicite:0]{index=0}

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