Ratios and percent : teacher's guide/ HARCOURT ACHIEVE - Austin, Texas : Harcourt achieve, c2006 - ix, 55 p. ; 28 cm. - Top Line Math . ISBN: 1-4190-0390-0 Subjects--Topical Terms: 1. Percentage.2. Ratio and proportion. Dewey Class. No.: Res. 513.2 H257 2006