Evaluate one number as a fraction of another
(a) Understand equivalent fractions
(b) Understand simplest form
(c) Know how to reduce a fraction to its simplest form, e.g. by recognising equivalent fractions, by using factors to 'cancel'
(d) Recognise prime numbers (i.e. numbers that can't be cancelled)
(e) Understand that quantities must be in the same units to evaluate one as a fraction of another