Andre and Elena are reading the same book over the summer.. Andre says he has read 1/5 of the book. Elena says she has read 20 more pages than Andre. If Elena is on page 55, how many pages are in the book?
If Elena is on page 55 and has read 20 more pages than Andre, it means Andre is on page 35.
If we let x be the number of pages in the book, we can express this as x*0.2=35. In other words 20% of x is 35.
If x*0.2=35 then x=35/0.2