Hint
Use the stated units and precision. Use the original amount as the percentage base and apply the appropriate multiplier.
Worked solution
(a)
Use the original amount as the percentage base and apply the appropriate multiplier.
\(36\)
Answer: \(36\)
(b)
Use the original amount as the percentage base and apply the appropriate multiplier.
\(22\)
Answer: \(22\)
(c)
Use the original amount as the percentage base and apply the appropriate multiplier.
\(336\)
Answer: \(336\)
Maths4U indicative marking guidance
Maths4U indicative marking guidance, not an official mark scheme. Credit complete valid alternative methods and consequential reasoning. An unexplained result does not earn a method mark.
(a) · 2 marks
- 1 mark: Use the original amount as the percentage base and apply the appropriate multiplier.
- 1 mark: Give the correct requested result, retaining signs, units and any domain restrictions.
Alternative methods: Any complete mathematically valid alternative method with the same restrictions and equivalent exact result is acceptable.
Common error: Keep intermediate values exact until the final step.
(b) · 2 marks
- 1 mark: Use the original amount as the percentage base and apply the appropriate multiplier.
- 1 mark: Give the correct requested result, retaining signs, units and any domain restrictions.
Alternative methods: Any complete mathematically valid alternative method with the same restrictions and equivalent exact result is acceptable.
Common error: Check the answer against the original conditions.
(c) · 2 marks
- 1 mark: Use the original amount as the percentage base and apply the appropriate multiplier.
- 1 mark: Give the correct requested result, retaining signs, units and any domain restrictions.
Alternative methods: Any complete mathematically valid alternative method with the same restrictions and equivalent exact result is acceptable.
Common error: Keep intermediate values exact until the final step.
Total: 6 marks.