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find the number

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Source: — Problem Solving |

by Anurag@Gurome » Sun Jan 16, 2011 4:52 am
Ramalakshmi wrote:four-fifth of a number is more than three-fourth of the number by 4 find the number
Say, the number is n.
Therefore, four-fifth of the number = (4/5)*n = (4n/5)
Therefore, three-fourth of the number = (3/4)*n = (3n/4)

According to the problem,
  • four-fifth of the number = three-fourth of the number + 4
    => (4n/5) = (3n/4) + 4
    => 16n = 15n + 80
    => n = 80

    Hence the number is 80.
Anurag Mairal, Ph.D., MBA
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by AIM GMAT » Sun Jan 16, 2011 4:59 am
(4/5)x - (3/4)x = 4

x = 80



Thanks & Regards,
AIM GMAT
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