Egyptian fractions
Try using these web-sites
Making one explaination When on the website click ctrl and F then in the box that appears type In how many ways can you make you should then get an explanation of how to do it.
Making one answers Once on the page scroll down a bit until you see the word example on the left. Then read across and you find the answers. It is a bit confusing but each number if you put a one in front then the fraction line it becomes clear. If the link doesn't work on the web-site befor (making one explanation) look for the link to click that's called A006585.
Hope it helped