Fractions

When one integer is divided by another, it is fraction for example

3/5 or 4/10 and many more.

Here in these examples 3 and 4 are numerators and 5 and 10 are denominators.

Further Reading:
Cracking the GRE, 2010 Edition (Graduate School Test Preparation)

Kaplan GRE Exam Vocabulary in a Box

Barron's GRE

Essential Words for the GRE (Barron's Essential Words for the GRE)

Kaplan GRE Exam 2010-2011 Premier with CD-ROM (Kaplan GRE Premier Program (W/CD))