GCSE Maths Specification

OCR J560

Section 2.03: Percentages

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#2.03a

Convert between fractions, decimals and percentages.

e.g. \(\dfrac{1}{4} = 0.25 = 25\%\)

\(1\dfrac{1}{2} = 150\%\)

#2.03b

Understand percentage is ‘number of parts per hundred’.

Calculate a percentage of a quanity, and express one quantity as a percentage of another, with or without a calculator.

#2.03c

Increase or decrease a quantity by a simple percentage, including simple decimal or fractional multipliers.

Apply this to simple original value problems and simple interest.

e.g. Add 10% to £2.50 by either finding 10% and adding, or by muliplying by 1.1 or \(\dfrac{110}{100}\)

Calculate original price of an item costing £10 after a 50% discount.

Express percentage change as a decimal or fractional multiplier. Apply this to percentage change problems (including original value problems).

[see also Growth and decay, 5.03a]