QS2—Percentages and percentage changes

Calculate, use and understand percentages and percentage changes.

Use qs2—percentages and percentage changes to connect the rule to the data and decision in the question.

This matters because qs2—percentages and percentage changes determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply qs2—percentages and percentage changes to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: QS2—Percentages and percentage changes is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.