Question

Question 11

Find the missing number in the box in each of the proportions:

$\frac{3}{5}=\frac{\square }{20}$

Answer 1

We have,
$\frac{3}{5}=\frac{?}{20}\Rightarrow \frac{3\times 4}{5\times 4}=\frac{?}{20}$ [Multiplying numerator and denominator by 4 to make denominator of both the ratios same]
$\Rightarrow \frac{12}{20}=\frac{?}{20}$
On comparing, we get, ? = 12