1.

The numerator of a fraction is 5 less than the denominator. If 9 is added to both numerator and denominator . if become 2/3 . find the fraction. ​

Answer»

✬ Fraction = 1/6 ✬

Step-by-step explanation:

Given:

  • NUMERATOR of a fraction is 5 less than denominator.
  • After adding 9 to both the fraction becomes 2/3.

To Find:

  • What is the original fraction ?

Solution: Let numerator be x and denominator be y. Therefore,

➟ Fraction = Numerator/denominator

➟ Fraction = x/y

Also,

➟ x = y – 5.........i

[ Now adding 9 to both ]

  • New numerator = x + 9

  • New denominator = y + 9

A/q

  • New fraction = 2/3

\implies{\rm } x + 9/y + 9 = 2/3

\implies{\rm } 3(x + 9) = 2(y + 9)

\implies{\rm } 3x + 27 = 2y + 18

\implies{\rm } 3x – 2y = 18 – 27

\implies{\rm } 3(y – 5) – 2y = – 9

\implies{\rm } 3y – 15 – 2y = – 9

\implies{\rm } y = – 9 + 15

\implies{\rm } y = 6

So, fraction is

  • Denominator = 6
  • Numerator = 6 – 5 = 1

Hence, original fraction was 1/6.



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