Recognise the per cent symbol (%) and understand that per cent relates tonumber of parts per hundred, and write percentages as a fraction with denominator 100, and as a decimal

What this means, in plain words

The denominator is the number underneath the line in a fraction. It tells you how many equal parts the whole was split into.

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.