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



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Jusaquikie
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\[\frac{ 30 }{42 } (\div) 6 = \frac{ 5 }{7 }\]
\[\frac{ 45 }{63 }(\div)9 = \frac{ 5 }{7 }\]
so the answer is \[\frac{ 45 }{63}\]

Jusaquikie
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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

KiArUnsYu
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thanks!

Jusaquikie
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np good luck

KiArUnsYu
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much needed ha.