Question

What must added 7/11 to get 12/13

Answer 1

Answer:

7/11 + x = 12/13

x = 12/13 - 7/11

= 132 - 91 / 143

= 41 / 143

Answer 2

Let the number added to 7/11 to get 12/13 be x.

Now, according to the question :-

$\implies \: x + \dfrac{7}{11} = \dfrac{12}{13}$

$\implies \: x = \dfrac{12}{13} - \dfrac{7}{11}$

LCM of 13 and 11 = 143

$\implies \: x = \dfrac{12}{13} - \dfrac{7}{11}$

$\implies \: x = \dfrac{132 -91 }{143}$

$\implies \: x = \dfrac{41 }{143}$

Answer :

41/143 must be added to 7/11 to get 12/13.

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Verification :

If we get sum of 41/143 and 7/11 as 12/13 then our answer is correct.

$\implies \dfrac{41}{143} + \dfrac{7}{11}$

LCM of 143 and 11 = 143.

$\implies \dfrac{41 + 91}{143}$

$\implies \dfrac{132}{143}$

$\implies \dfrac{12}{13}$

Hence verified

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