# Chapter 1 - Tools of Geometry - 1-2 Points, Lines, and Planes - Practice and Problem-Solving Exercises - Page 19: 72

5 to 2

#### Work Step by Step

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: $5\ to\ 2$

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