“Find 3/4 of 240” looks easy until it is not. On 11+ papers, fractions of amounts often sit inside word problems, money contexts, or multi-step questions. Children who can shade a fraction diagram still leak marks on the final calculation.
What usually goes wrong
- Dividing by the numerator instead of the denominator
- Finding one part correctly, then forgetting to multiply
- Losing track of units (pence vs pounds, cm vs m)
- Stopping after an intermediate step in a two-step word problem
- Rushing the arithmetic after a correct method
That last one is common: the method is known; the check is missing.
A focused practice pattern
- Eight fraction-of-amount questions in 15 minutes.
- Before writing the final answer, require one check (inverse operation or estimate).
- Mark sure-but-wrong separately from don’t-know.
- If slips dominate, keep drilling under light time pressure.
- If method errors dominate, teach with simpler numbers first, then rebuild speed.
Do not jump straight back to a full unread paper until this leak shrinks.
Frequently asked questions
Should fractions practice always be timed?
Not while the method is still shaky. Secure accuracy first, then add a light timer so exam pace does not recreate slips.
Are percentages a separate problem?
Often related. If percentages are also weak, practise the building blocks (10%, 5%, 1%) after fractions of amounts are more stable.