Solve problems involving the calculation of percentages [for example, of measures and such as 15% of 360] and the use of percentages for comparison

What this means, in plain words

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

This is problem solving: the maths is met inside a situation, so the first job is working out which operation the question is asking for.

Measuring compares an amount against a unit, and the unit has to be stated for the number to mean anything.