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Mathematics 18 Online
OpenStudy (anonymous):

Which of the following shows a proportion? Answer eight over eighteen equals twelve over twenty-seven six over four equals eight over twelve twelve over twenty equals ten over eighteen three over eight equals ten over fifteen

OpenStudy (mertsj):

\[\frac{8}{18}=\frac{12}{27}\]

OpenStudy (mertsj):

Multiply the cross products. If they are equal, it is a proportion.

OpenStudy (mertsj):

Does 8 times 27 = 18 times 12?

OpenStudy (mertsj):

216=216 !!! Yes. It is a proportion

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