Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.
Solve equivalent ratio problems, both word problems and mathematical problems. Some of these problems can be multiple-choice. For example, which ratio is equivalent to 6 : 10? Here's a nice word problem for your students to try. After that, give your students this challenge.