The number of students in a class is increased by $20 \%$ and the number now becomes $66$. Initially,the number was:

The $75 \%$ of a number is $380$ more than $35 \%$ of the same number. What is $20 \%$ of that number?

Two students appeared for an examination. One of them secured $19$ marks more than the other and his marks were $60 \%$ of the sum of their marks. The marks obtained by them are

$0.005 = (-?-)*$

The difference between two numbers is $1600$. If $7.5\%$ of one number is equal to $12.5\%$ of the other number,find the two numbers.

Two tailors $X$ and $Y$ are paid a total of ₹ $550$ per week by their employer. If $X$ is paid $120$ percent of the sum paid to $Y$,how much is $Y$ paid per week?