Massachusetts Curriculum Frameworks
MA.6.RP. Ratios and Proportional Relationships
6.RP.A. Understand ratio and rate concepts and use ratio and rate reasoning to solve problems.
6.RP.A.3. 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.
6.RP.A.3.c. Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30∕100 times the quantity); solve problems involving finding the whole, given a part and the percent.