Is the given fraction is a unit fraction or not.

$\frac{1}{9}$

The simplest form of $\frac{273}{195}$ is…..?   

Which of the following relation is correct?

There are 10 boys and 10 girls in a group. After adding some boys to the group, the percentage of girls becomes 10%. How many boys were added.

Simplify: $\left(\frac{1}{9}+\frac{3}{5}\right)$$÷$$\left(\frac{2}{9}+\frac{2}{5}\right)$

(A)$\frac{31}{27}$

(B)$\frac{33}{28}$

(C)$\frac{7}{8}$

(D)$\frac{8}{7}$

$\frac{(a-b{)}^3+(b-c{)}^3+(c-a{)}^3}{3(a-b)(b-c)(c-a)}=?$

What is the value of above expression?

What will be the minimum value of $x$ so that  $\frac{55}{x-19}$ becomes a complete number?

What should come in place of the question mark (?) in the following question:

$18\frac{2}{3}-7\frac{1}{4}=?+1\frac{1}{2}$

A cake is distributed among 5 friends. Four of them get $\frac{1}{8}, \frac{1}{6}, \frac{5}{12}$ and $\frac{1}{12}$, and as shares. What part of the cake will be got by the fifth friend?

What is the fraction which is subtracted from$\frac{1}{2}$, the leaves $\frac{3}{4}$?