What is the relationship between 70/100 and 7/10?

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Fast! find the length of cu. the triangles are similar. show your work.

In the diagram below,abc is congruent to dec what is the value of x