1.

Number \([ - \frac{{11}}{{20}},\;\frac{7}{{ - 15}},\;\frac{{17}}{{ - 30}}\;and - \frac{3}{{10}}]\) are written in descending order as1. \(\frac{{17}}{{ - 30}}\; > \; - \frac{{11}}{{20}}\; > \; - \frac{3}{{10}}\; > \;\frac{7}{{ - 15}}\)2. \( - \frac{3}{{10}}\; > \;\frac{7}{{ - 15}}\; > \; - \frac{{11}}{{20}}\; > \;\frac{{17}}{{ - 30}}\)3. \( - \frac{3}{{10}}\; > \; - \frac{{11}}{{20}}\; > \;\frac{7}{{ - 15}}\; > \;\frac{{17}}{{ - 30}}\)4. \( - \frac{{11}}{{20}}\; > \;\frac{{17}}{{ - 30}}\; > \; - \frac{3}{{10}}\; > \;\frac{7}{{ - 15}}\)

Answer» Correct Answer - Option 2 : \( - \frac{3}{{10}}\; > \;\frac{7}{{ - 15}}\; > \; - \frac{{11}}{{20}}\; > \;\frac{{17}}{{ - 30}}\)

Concept:

First, find the LCM (Lowest Common Factor) of the given fraction.

Then arranged it according to the given question.

Given:

\([ - \frac{{11}}{{20}},\;\frac{7}{{ - 15}},\;\frac{{17}}{{ - 30}}\;and - \frac{3}{{10}}]\)

Calculation:

LMC of the (20, 15, 30, 10) = 60

Multiply each fraction with the LCM i.e. 60

⇒ - 11/20 × 60 = - 33

⇒ - 7/15 × 60 = - 28

⇒ - 17/30 × 60 = - 34

⇒ - 3/10 × 60 = - 18

After arrange in decreasing order (descending order), We find that

\( - \frac{3}{{10}}\; > \;\frac{7}{{ - 15}}\; > \; - \frac{{11}}{{20}}\; > \;\frac{{17}}{{ - 30}}\)



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