After reading 13 of a book, 100 pages remain. How many pages are there in the book?

A fraction is such that if double of the numerator is increased by 10% and triple of the denominator is decreased by 30%, the resulting fraction becomes equal to 11% of 1621. The original fraction is:

In a certain office, 13 of the workers are women, 12 of the women are married, and 13 of the married women have children. If 34 of the men are married and 23 of the married men have children, what part of the total workers are without children?