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25 June, 05:30

Between 2000 and 2014 , the number of twin births in a certain country increased by 15 %, to approximately 133975. About how many twin births were there in 2000?

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Answers (2)
  1. 25 June, 07:23
    0
    116500

    Step-by-step explanation:

    We are looking for the number of twin births in 2000.

    Let the number of twin births in 2000 be x.

    The number of twin births in 2000 is 100% of the number of births in 2000 since 100% of something is the entire thing.

    The number of twin births went up 15% from 2000 to 2014, so in 2014, the number of twin births was 100% of the number of twin births plus another 15% of the number of twin births.

    100% + 15% = 115%

    The number of twin births in 2014 was 115% of x.

    The number of twin births in 2014 was 133975.

    115% of x = 133975

    115% * x = 133975

    1.15x = 133975

    x = 133975/1.15

    x = 116500

    The number of twin births in 2000 was 116500.
  2. 25 June, 08:36
    0
    116,500.

    Step-by-step explanation:

    The equation is

    x + 0.15x = 133975 where x = the number of twin births in the year 2000.

    1.15x = 133975

    x = 133975 / 1.15

    = 116,500.
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