Harry has 50 sweets.
He gives 25\displaystyle \frac{2}{5}52 of the sweets to Sandra.
He gives 310\displaystyle \frac{3}{10}103 of the sweets to Jamie.
Harry keeps the rest of the sweets for himself.
Work out how many sweets Harry keeps.
87 exam-style questions on WJEC GCSE Maths Fractions of an Amount. Each one has a worked solution and a mark scheme showing where the marks go.