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Topic: Number, Fractions, Decimals, Percentage, Ratio and Proportion (Higher - Unit 3)

Specification References: N2.5

N2.5 Understand that ‘percentage’ means ‘number of parts per 100’ and use this to compare proportions.


Candidates should be able to:

  • interpret percentage as the operator 'so many hundredths of'
  • use percentages in real-life situations
  • work out percentage of shape that is shaded
  • shade a given percentage of a shape

Notes

This is part of the core number work required across all units. The core number work will be assessed so that it is linked to other specification references within this unit.
For example, 10% means 10 parts per 100, and 15% of Y means

Examples

  1. This diagram shows a rectangle:

         Work out the percentage of the rectangle that is shaded.


view more examples

  1. The length of the rectangle is 3.6 cm
    The width of the rectangle is 2.5 cm

          Work out the shaded area.

  1. The length of the rectangle is 8.6 cm
    The width of the rectangle is 9.2 cm

        How many of the small triangles should be shaded so that more than 50 cm² is
        shaded?