Proportions and Percentages

Proportions and Percentages Proportions and Percentages - Start

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Proportions and Percentages - Description

By Louise Penny . and. . Hilary Newton. Scenario. It is your 21. st. birthday and you have decided to have a costume party. You will provide finger foods and it is BYO drinks ! Your guests will leave with a . ID: 548239 Download Presentation

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Proportions and Percentages




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Presentations text content in Proportions and Percentages

Slide1

Proportions and Percentages

By Louise Penny

and

Hilary Newton

Slide2

Scenario

It is your 21

st

birthday and you have decided to have a costume party. You will provide finger foods and it is BYO drinks ! Your guests will leave with a

lolly

bag

The invitations have been sent out and you have received your RSVP’s

Let’s get this party started !!

Slide3

How Many People are Attending?

You sent out 50 invitations and 30 people have RSVP’d to confirm their attendance. What percentage are attending? What percentage have declined?

X

Slide4

Lollies

You have 3 types of lollies. You want to distribute a total of 24 lollies into the lolly bags, to the ratio of 5:4:3.

Slide5

How many lollies did you have to the ratio of 5?How many lollies did you have to the ratio of 4?How many lollies did you have to the ratio of 3?

Slide6

Costumes

Find the final price of these costumes in Euros !

€ 50

postage = 10% of garment price

€ 75

postage = free

Special: 20% off !

Slide7

Convert your Final Price into $ AUD

1 € = $ 1.50

Slide8

Recipes

You have chosen the recipes for your 21

st

. However they serve less or more than 30 people.

What proportion is your recipe serving of your guests?

E.g. you are serving 10 people. Your recipe serves 5 people.

The proportion is 5 out of 10, which can be expressed as 50%, 0.5 or ½

.

E.g. you are serving 10 people. Your recipe serves 15 people. The proportion is 15 out of 10, which can be expressed as 150%, 1.5 or 1½.

Slide9

Recipes

Change quantities of the recipe to serve 30

Recipe A serves 75 people. Change this recipe to serve 30 people

.

Recipe B serves 20 people. Change this

recipe

to serve 30 people.

Slide10

Strategies

Haylock: four-cells diagram

Trial and error

Concrete/Manipulation

Estimation

Models/Diagrams

Patterns/Like numbers


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