Question

fill in the blank to make the two fractions equivalent.
\\(\frac{}{42}=\frac{3}{7}\\)

Explanation:

Step1: Set up proportion

Let the number in the blank be $x$. We have the proportion $\frac{x}{42}=\frac{3}{7}$.

Step2: Cross - multiply

$7x = 3\times42$.

Step3: Calculate the right - hand side

$3\times42 = 126$, so $7x=126$.

Step4: Solve for $x$

$x=\frac{126}{7}=18$.

Answer:

18