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Question:


fonzyy
Student
High School - 9th Grade

American electric plants serve 9,500,000 homes.The estimated number of homes in the United States is 21,000,000. What % receives electrical energy?

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Posted by fonzyy on Saturday June 13, 2009 at 7:56 PM and tagged with science, thomas edison and the light bulb.

Answers:

  1. krishna-agrawala
    krishna-agrawala Teacher
    Graduate School

    eNotes Editor

    Best answer as selected by question asker.

    Let us say:

    Number of homes served by electric plants = n

    and

    Total number of homes = N

    Then formula for calculating the percentage of homes served by electricity is

    Percentage of homes served = (n/N) x 100

    = (9500000/21000000) x 100

    = 950/21 = 45.23809 %

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    Posted by krishna-agrawala on Saturday June 13, 2009 at 8:30 PM

  2. neela
    neela Teacher
    Graduate School

    eNotes Editor

    Best answer as selected by question asker.

    Percentage is way of telling a fraction  in another  equivalent  fraction  like what is that number for every 100.

    9500000 Homes out of 21000000 getting service by AEC. How many are served  out of 100. By ratio and proportion ,

    9,500,000:21,000,000 = x :100.

    Therefore, = Product of end terms/ known middle term=9,500,000*100/21,000,000= 950/21=45.2381%

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    Posted by neela on Tuesday June 16, 2009 at 11:40 PM