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KiArUnsYu

  • 3 years ago

which ratio forms a proportion with 30/42 15/27 28/40 45/63 21/15

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  1. Jusaquikie
    • 3 years ago
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    \[\frac{ 30 }{42 } (\div) 6 = \frac{ 5 }{7 }\] \[\frac{ 45 }{63 }(\div)9 = \frac{ 5 }{7 }\] so the answer is \[\frac{ 45 }{63}\]

  2. Jusaquikie
    • 3 years ago
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    another way to get it is to cross multiply if you get the same number they are proportional. 30*63 = 1890 45*42 = 1890

  3. KiArUnsYu
    • 3 years ago
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    thanks!

  4. Jusaquikie
    • 3 years ago
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    np good luck

  5. KiArUnsYu
    • 3 years ago
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    much needed ha.

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