Mathematics

Question

If 2 over 7 of a ton of concrete covers 7 over 8 of a wall, how many tons of concrete are required to cover the entire wall?

1 Answer

  • Set up a proportion:

    2/7/7/8 = x/1

    Multiply 1 to both sides:

    (2/7 * 1)/(7/8) = x

    (2/7)/(7/8) = x

    Flip the 2nd fraction and multiply:

    2/7 * 8/7

    Multiply the numerators and denominators together:

    16/49

    So 16/49 tons of concrete are required to cover the entire wall.
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