Fill in the blank box in each of the following:

$\frac{3}{4}=\frac{\left[\right]}{28}$

Fill in the blanks:

……………. = $\frac{3}{10}=$$\mathrm{three}-\mathrm{tenths}$

Q. Fill in the blank box in each of the following:

(iv)$\frac{7}{\left[\right]}=\frac{21}{18}$numerator

Fill in the blank box in each of the following:

$\frac{5}{9}=\frac{[]}{81}$

Fill in the blank

$1\frac{5}{28}-\left[\right]=\frac{3}{4}$

Fill in the blanks:

$-18+\left(-28\right)=\_\_\_\_\_\_$