Question

Fill the box with missing number.

$\frac{28}{40}=\frac{\square }{10}$

Answer 1

Given : $\frac{28}{40}=\frac{\square }{10}$

Using the cross-product method.

$28\times 10=\square \times 40$

From the above, we can write as

$$\begin{gathered} \square \times 40=28\times 10 \\ \square =\frac{28\times 10}{40} \end{gathered}$$

$\square =28\times \frac{10}{40}$

$10$ divided by $40$, we will get the result $\frac{1}{4}$

$$\begin{gathered} \square =28\times \frac{1}{4} \\ \square =\frac{28}{4} \end{gathered}$$

Divide $28$ by $4$, we will get the result $7$.

$\square =7$

Therefore, $\frac{28}{40}=\frac{7}{10}$