Use fast mental patterns in the final revision hour before an exam.
What to focus on
- Keep only the most used percentage conversions in memory.
- Prioritise accuracy over fancy shortcuts.
Quick formula / idea
- 10%, 5%, 1%, 0.5% ladder is enough for many questions.
13% of 700 = 70 + 14 + 7 = 91.
Practice prompts
- Find 13% of 900.
- Find 17% of 600.