Question

please answer only if u know
only maths aryabhatta and a educated person should answer
full explanation needed​

Answer 1

$\Large\bf\pink{Answer:-}$

Since, the given rational numbers have different denominators

we need to first make the denominators same!!

L.C.M of 10,5,15,30 = 30

now,

$\sf \frac{ - 3}{10} = \frac{3 \times 3}{10 \times 3} = \frac{ - 9}{30}$

$\sf \frac{ - 7}{ - 5} = \frac{7 \times - 6}{5 \times - 6} = \frac{42}{30}$

$\sf \: \frac{9}{ - 15} = \frac{9 \times - 2}{ - 15 \times - 2} = \frac{ - 18}{30}$

$\sf \frac{18}{30} = \frac{18 \times 1}{30 \times 1} = \frac{18}{30}$

By arranging the rational numbers in descending order we get,

$\bf \qquad \red{ \frac{42}{30} , \frac{18}{30} , \frac{ - 9}{30} , \frac{ - 18}{30} }$

Therefore,

$\bf \qquad \qquad \blue{ \frac{ - 7}{ - 5} , \frac{ 18}{30} , \frac{ - 3}{10} , \frac{9 }{ - 15} }$

Is the correct order!!

Hope it helps uh :)