This document provides an overview of rounding techniques that are important for GRE exam preparation. It discusses rounding decimals to the nearest integer, such as rounding 14.3 to 14 and 15.9 to 16. The rules for rounding numbers ending in 5 are explained, such as rounding 7.5, 8.5, and 9.5 up. It also covers rounding negative values, avoiding rounding up twice, and examples of rounding decimals like 12.320 to 12.30. The document concludes with an example GRE question about calculating a profit percentage.