Percentages can case problems for children of all ages, not just in year 6, the age group that this page is targeted at. The percentage sign % is all around us when we go shopping, usually with money off, but it can often cause confusion with even with adults. Children should be able to relate percentages to fractions and know that:
one whole = 100%
one half = 50%
one quarter = 25%
one tenth = 10%
one hundredth = 1%.
With this knowledge they should be able to work out most problems that they come across, including those on the worksheet here.