$A$ number is increased by $84$,it becomes $107 \%$ of itself. What is the number?

In a class of $50$ students and $5$ teachers,each student received sweets equal to $12 \%$ of the total number of students,and each teacher received sweets equal to $20 \%$ of the total number of students. How many sweets were there in total?

$P$ is $20\%$ more than $Q$ and $40\%$ less than $R$. If the value of $Q$ is $₹ 150$,then what is the value of $R$ (in $₹$)?

Which one of the following shows the best percentage?

In a competitive examination in state $A$,$6\%$ of the total candidates who appeared were selected. State $B$ had an equal number of candidates who appeared,and $7\%$ of the candidates were selected,which resulted in $80$ more candidates being selected than in state $A$. What was the number of candidates who appeared from each state?

The weight of a container alone is $25 \%$ of the container filled with a certain fluid. When some fluid is removed,the weight of the container and remaining fluid is $60 \%$ of the original total weight. What fractional part of the liquid has been removed?