IGCSE Maths Specification

Edexcel A 4MA1

Section 1.6: Percentages

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#1.6A

understand that ‘percentage’ means ‘number of parts per 100’

#1.6B

express a given number as a percentage of another number

#1.6C

express a percentage as a fraction and as a decimal

#1.6D

understand the multiplicative nature of percentages as operators

\(15\% \text{ of } 120 = \dfrac{15}{100} × 120\)

#1.6E

solve simple percentage problems, including percentage increase and decrease

#1.6F

use reverse percentages

In a sale, prices were reduced by 30%. The sale price of an item was £17.50. Calculate the original price of the item

#1.6G

use compound interest and depreciation

#1.6H

use repeated percentage change

Calculate the total percentage increase when an increase of 30% is followed by a decrease of 20%

#1.6I

solve compound interest problems