This 'ruler' is designed to illustrate the relationship between fraction, decimal and percent. Students can move from fraction to decimal, decimal to percent and percent to fraction by simply moving the slider. This tool will enable students to clearly see the equivalence between fraction, decimal and percent. The slider is printed with 0.05 increment markings which can be used to develop many number skills including estimating, addition and subtraction calculations. Fraction circle and fraction strip graphics are printed on the back for students to see the relationship between the circular and linear presentation. A detailed teacher's guide is available online.