The Percentages Lesson explained above is aligned with the standard 6RP03 from the Common Core Standards For Mathematics (see the shortened extract below). The resources below are also aligned to this standard.
Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., ...
Math Games From The BBC
Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:
Understand ratio concepts and use ratio reasoning to solve problems