math

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There is a circle that is cut in three slices one slice is (in fractions) 1/3 and one slice is 1/5. What fraction is the other slice. (it is a whole circle.)
Can you please tell me how to I can figure this out on my own.

  • math -

    1/3 + 1/5
    = 5/15 + 3/15
    = 8/15

    wouldn't that leave 7/15 for the third slice ?

  • math -

    But how did you figure it out like that.

  • math -

    1/2 + 1/5 = 8/15, (see above)

    the whole circle is 1 or 15/15

    15/15 - 8/15 = 7/15

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