Interactive fraction. Fraction Sense About fractions, and the construction of the rational numbers: ℚ set. To play with proper and improper fractions, positive and negative also. All fractions in order from least to greatest. You can increase or decrease the fractions included in the app, increasing or decreasing the density of lines in the lower graph framework. The accuracy of the application depends on the capabilities of the device. The application provides two representations: a circle a