6.1 Percentage of an amount — Practise with help
Try each question before opening a hint. Reveal the full working to check your method.
Warm-up: remember
- Write 25% as a decimal.
- Work out 10% of 90.
Check your answers
- 0.25. 2. 9.
Practise with help
1. Find 15% of 200.
Hint
Split 15% into 10% and 5%.
Full working
10% is 20 and 5% is 10, so 15% is 30.
2. Find 32% of £450.
Hint
Find 30% and 2%, then add.
Full working
30% is £135; 2% is £9; total £144.
3. Find 7.5% of 160.
Hint
Use 10% minus 2.5%.
Full working
10% is 16 and 2.5% is 4, so the answer is 12.
Progress check: revisit your savings estimate. What calculation would make it exact?