5/9 of village population are males. If 30% males are married, what percentage of total population are unmarried females?

In an office 3/5 of total employees are female and rest are males. If 2/9 part of females and 1/4 part of males are absent, then what part of total employees are absent?

A fraction is such that if double the numerator and triple the denominator are changed by +10% and −30% respectively, the result is 11% of 16/21. The fraction is

If 1/5 of 3/4 of a 1/3 of the number is 24, then 20% of that number is %

The sum of the numerator and denominator of a fraction is 11. If 1 is added to the numerator and 2 is subtracted from the denominator, it becomes 2/3 . The fraction is

The value of 1/2 + 1/6 + 1/12 + 1/20 + 1/30 + ... + 1/[n(n+1)] is equal to