23 September 2013

23 September, S1 - Year 9B*

Title: Percentage
Learning Targets


Beginning
To be able to calculate simple percentages of a quantity using the bubble method.
If 100% = 300, how do we find 15%?

Developing
To be able to demonstrate how to find any percentages of a quantity by using decimals.
What is 5% as a decimal? How can I use this to find 5% of 455?


To be able to use a percentage increases and decreases.
A coat which costs £35 is reduced by 12.5% in a sale - how much do you now pay?

Mastering

To be able to calculate a percentage increases and decreases.
A coat which costs £35 is reduced to £25 in a sale - what is this percentage change?

To know how to calculate compound interest and investigate how it differs to simple interest.
I invest £1200 for 3 years at an interest rate of 3.5% - how much money do I have after 3 years?

Resources





Beginning




Developing


MEP - 11.2, page 3

Percentage of a number - Top Trumps (print)


Increases and decreases of percentages.


CIMT - Percentage Increase


Fraction, Decimals and Percentages: MEP - 11, page 1


Mastering
Calculating percentage changes
Introduce students to the idea of percentage change

Compound Percentages











MEP 11.8, page 23

Homework
To explain how to calculate a percentage change.