Question 70 (i)

Express the following rational number in its standard form:
$\frac{- 12}{- 30}$

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Solution

Given rational number is $\frac{- 12}{- 30}$
For standard form of given rational number $= \frac{- 12 \div 6}{- 30 \div 6}$ [ $∵$ HCF of 12 and 30 = 6]
$= \frac{- 2}{- 5} = \frac{2}{5}$
Hence, the standard form of $\frac{- 12}{- 30}$ is $\frac{2}{5} .$

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Question 70 (iii)

Express the following rational number in its standard form:
$\frac{- 15}{35}$

Question 70 (iv)

Express the following rational number in its standard form:
$\frac{299}{- 161}$

\frac{- 15}{35}

Express each of the following rational numbers in standard form :

(i) $\frac{- 12}{30}$ (ii) $\frac{- 14}{49}$ (iii) $\frac{24}{- 64}$ (iv) $\frac{- 36}{- 63}$

\frac{- 209}{247}

\frac{- 46}{115}

\frac{84}{- 147}

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