Question

which ratio forms a proportion with 30/42

15/27

28/40

45/63

21/15

Answer 1

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

Answer 2

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

Answer 3

thanks!

Answer 4

np good luck

Answer 5

much needed ha.