Recall and use equivalences between simple fractions, decimals and percentages, including in different contexts

What this means, in plain words

A decimal writes parts of a whole using the places after the point: tenths, then hundredths, then thousandths.

Per cent means out of one hundred, so 30 per cent is 30 parts out of 100.

A fraction describes part of a whole, or part of a set, once the whole has been split into equal pieces.