Assessing Understanding of Fraction Ordering

Clicking on the new problem button displays three fractions (rational numbers) in the {Denominator, Numerator} plane. Which is the largest fraction? the smallest fraction? How are the positions of the three dots (blue, yellow, green) in the left-hand panel related to the magnitude of the fractions on the number line in the right-hand plane? What other questions [could,would] you ask?