Question

-4/9 , 20/-45 . check whether this pair has equal rational number​

Answer 1

LCM = 45

$\frac{ - 4}{9} \times \frac{5}{5} = \frac{ - 20}{45} \\ \frac{20}{ - 45} \times \frac{1}{1} = \frac{20}{ - 45}$

so it is equal

Answer 2

Answer
Correct option is
A
90
36
​
.and.
130
52
​

(A)
90
36
​
=
15
6
​
=
5
2
​

130
52
​
=
65
26
​
=
13×5
13×2
​
=
5
2
​

∴
90
36
​
&
130
52
​
are equivalent rational numbers.

(B)
24
−15
​
=
8
−5
​

−72
−45
​
=
24
15
​
=
8
5
​

∴
24
−15
​
&
−72
−45
​
are not eqivalent rational numbers.

(C)
36
−11
​
and
72
22
​

Again since there signs are different , they are not equivalent rational numbers.

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