Question

15/9=?/18

Answer 1

When we talk about fractions, we can multiply the numbers above and below the line by any number without altering it's result.

Since there's an equal, we call a "proportion".

\[\frac{ 15 }{ 9 }=\frac{ x }{ 18 }\]
Se let's multiply in cross:
\[(15)(18)=9x\]
Let's do some operating:
\[270=9x\]
Let's find the value of x
\[\frac{ 270 }{ 9 }=x\]
x=30

So the answer is:
\[\frac{ 15 }{ 9 }=\frac{ 30 }{ 18 }\]

Answer 2

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