So wise.
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[–] 22 points 4 months ago (22 children)
  • [–] 35 points 4 months ago (17 children)

    So 50% of 50 is the same as 50% of 50. Both equal 5

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  • [–] 26 points 4 months ago (3 children)

    Both equal 5

    More like 5 of these

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  • [–] 9 points 4 months ago (10 children)
  • [–] 6 points 4 months ago* (last edited 4 months ago) (9 children)

    0! is 0.

    Edit. I remembered wrong. Keeping it like this as it is funnier that way.

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  • [–] 4 points 4 months ago (1 child)

    factorials are mostly encountered in combinatorics, which is problems like, how many ways are there to put 3 objects of different colors in a row? well, the first can be any of the 3, the second can be either of the other 2, and the last is whichever 1 is left, so 3×2×1=3!=6

    so how many ways are there to put 0 objects in a row? well there's 1, it's this one:

    ‎
    ‎

    that's why 0!=1

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  • [–] 2 points 4 months ago (3 children)
  • [–] 9 points 4 months ago

    taking x% is just multiplying by x/100, and multiplication is commutative. x% of y is just y×x×1/100, which is the same as x×y×1/100

    you can also ignore the % and divide by 100 at the end. for example, what's 5% of 5? that might take a minute to work out. what's 25/100? you instantly know it's 1/4

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