You can figure out if two fractions are bigger by just cross multiplying the numerator and denominator of each fraction.
[tex] \frac{5}{12} \frac{3}{7} [/tex]
Multiply the 5 and 7, and then the 3 and 12. Be sure to start with the numerator of the first fraction.
[tex] \frac{5}{12} \frac{3}{7} [/tex]
5 * 7 = 35, 3 * 12 = 36
So [tex] \frac{3}{7} [/tex] is bigger.
