Percentages and financial mathematics.
Use percentage multipliers, reverse changes and fair comparisons to make and check financial decisions.
Work through the topic
Learn the method, follow the examples, then try the worksheet.
- 01
Percentage increase/decrease
Calculate percentage increases and decreases using the original amount and a multiplier.
- 02
Finding an original amount
Recover an original amount from a final amount after a percentage increase or decrease.
- 03
Discounts and mark-ups
Distinguish cost price, selling price, mark-up and discount, and combine changes correctly.
- 04
Percentage comparisons
Compare percentages fairly, identify their base amounts and distinguish percentage points from relative change.
- 05
Budgets and purchase decisions
Build a realistic budget, distinguish essential costs from optional spending and justify a purchase decision.
- 06
Modelling and checking financial problems with digital tools
Create and check simple spreadsheet-style financial models, state assumptions and test changes.
Topic review
Revisit the key ideas, then choose a practice paper.