## Geometry: Common Core (15th Edition)

Simplify by eliminating common factors from each side of the ratio. $30\ to\ 12$ is the same as: $(5\times3\times2)\ to\ (3\times2\times2)$ Eliminate common factors. $(5\times/\!\!\!3\times/\!\!\!2)\ to\ (/\!\!\!3\times/\!\!\!2\times2)$ Which leaves: $5\ to\ 2$