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Scotty

  • 5 years ago

what is 3/5 of 30? and how do you work this out?

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  1. shadowfiend
    • 5 years ago
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    Whenever you say `some fraction OF some number', you can multiply the two together to get your number. So, in this case: 3/5 OF 30 means: \[\frac{3}{5}\times 30\]

  2. shadowfiend
    • 5 years ago
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    Can you do that multiplication?

  3. SCOTTY
    • 5 years ago
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    No

  4. SCOTTY
    • 5 years ago
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    do I do 3*30 and then 5*30?

  5. SCOTTY
    • 5 years ago
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    i've found the answer!!!

  6. shadowfiend
    • 5 years ago
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    AWESOME!

  7. shadowfiend
    • 5 years ago
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    Hehe, sorry for abandoning you there for a minute. That was the equivalent of: \[\frac{3}{5}\times \frac{30}{1}\] So you can multiply the 3 across and keep the 5, then do the division.

  8. SCOTTY
    • 5 years ago
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    is the answer 18?

  9. apples
    • 5 years ago
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    Yes, it is. \[\frac{3}{5} \cdot \frac{30}{1} = \frac{3 \cdot 30}{5 \cdot 1} = \frac{3 \cdot 6}{1} = \frac{18}{1} = 18\]

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