The answer is True.
Because headlines are only using few words, is possible for a misleading. Headlines are only texts to indicate the whole article. The headline’s only purpose is to quickly and briefly draw the attention to the whole story or article.
10/40 simplified is 1/4
1/4 equals 25%
Yes, it can, depending on the word. Prefixes, however, almost never change the root word. The most common changes of a root when adding suffixes are the removal of a final E that follows a consonant (e.g. diving), or the change of a Y to an I (e.g. silliness).
