Hailey is reading a book that is 250 pages. She wants to read 40% of her book today. Write an equation(proportion), that can be used to determine how many pages Hailey needs to read I know it's 100 but how do I write it as a proportion??

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil