ఒక భిన్నం యొక్క లవం 20% పెరిగి మరియు హారం 30% తగ్గినట్లయితే, పొందిన భిన్నం \(\frac{{39}}{{25}}\). అసలు భిన్నం:

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SSC Matric Level Previous Paper (Held on: 9 Nov 2020 Shift 1)
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  1. \(\frac{{67}}{{75}}\)
  2. \(\frac{{100}}{{91}}\)
  3. \(\frac{{75}}{{68}}\)
  4. \(\frac{{91}}{{100}}\)

Answer (Detailed Solution Below)

Option 4 : \(\frac{{91}}{{100}}\)
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ఇవ్వబడింది:

ఒక భిన్నం యొక్క లవం 20% పెరిగి మరియు హారం 30% తగ్గినట్లయితే, పొందిన భిన్నం 39/25

ఉపయోగించిన కాన్సెప్ట్:

శాతం

లెక్కింపు:

భిన్నం x/y గా అనుకోనుము

ప్రశ్న ప్రకారం,

⇒ \(\frac{{x + \frac{{20x}}{{100}}}}{{y - \frac{{30y}}{{100}}}} = \frac{{39}}{{25}}\)

⇒ \(\frac{{\frac{{6x}}{5}}}{{\frac{{7y}}{{10}}}} = \frac{{39}}{{25}}\)

⇒ \(\frac{{6x}}{{7y}} = \frac{{39}}{{25}} \times \frac{5}{{10}}\)

⇒ \(\frac{x}{y} = \frac{{39}}{{50}} \times \frac{7}{6}\)

⇒ \(\frac{x}{y} = \frac{{273}}{{300}}\)

∴ \(\frac{x}{y} = \frac{{91}}{{100}}\)

 అసలు భిన్నం 91/100
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