AC9M6N09
“use mathematical modelling to solve practical problems, involving rational numbers and percentages, including in financial contexts; formulate the problems, choosing operations and efficient calculation strategies, and using digital tools where appropriate; interpret and communicate solutions in terms of the situation, justifying the choices made”
Official source: Australian Curriculum v9 — Mathematics ↗ · Content © ACARA, CC BY 4.0 · unofficial reference — verify at the official site