If the choices don't include my answer or yours, take each choice in turn and calculate what the question should have been, that is, work out what fraction would generate each choice. You may discover that the question contains a mistake, a typing error. The request to simplify may be to break the question down, for example, 2633=2628+5; 2628/18=146 and the remainder is 5 or, more specifically, 5/18.