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Mathematics

Percentages

Educator section

Memorandum

  • a) (i) 1 8 size 12{ { { size 8{1} } over { size 8{8} } } } {} / 12 , 5 100 size 12{ { { size 8{"12",5} } over { size 8{"100"} } } } {} / 125 1000 size 12{ { { size 8{"125"} } over { size 8{"1000"} } } } {}

(ii) 3 20 size 12{ { { size 8{3} } over { size 8{"20"} } } } {}

  1. 15

( 1 4 size 12{ { { size 8{1} } over { size 8{4} } } } {} of 60)

  1. 9

(15–6)

22.2 a) 1 10 size 12{ { { size 8{1} } over { size 8{"10"} } } } {} of 24 = 2,4

2 hour 24 minutes

b) Fieldwork

Fitness

c) 1 8 size 12{ { { size 8{1} } over { size 8{8} } } } {}

  1. 3,6 hour

3 hour 36 minutes

Leaner section

Content

Activity: pie graph with percentage (%) [lo 2.6, lo 5.8, lo 5.9]

22. PIE GRAPH WITH PERCENTAGE (%)

22.1 Study the following pie graph with a friend and then answer the questions that follow:

The music taste of a Grade 7 class:

a) What fraction of the learners likes

(i) classical music? .........................

(ii) spiritual music? .........................

b) If there are 60 learners in the class, how many listen to “rap”?

c) What is the difference between the number of learners who listen to “Boere” music and to “rap”?

d) What kind of music is your favourite?

22.2 Now look at this pie graph that shows the South African cricket team’s daily routine. Answer the following questions:

a) How many hours each day is allowed for relaxing?

b) What do they spend the equal amount of time on?

c) What fraction of the day is spent on bowling practise?

d) How many hours per day are allocated to fitness exercises?

23. CHALLANGE!

Can you draw a column graph from one of the pie graphs?

24. Time for self-assessment

  • Tick the applicable block:
YES NO
I can calculate % of amounts (15.1 – 15.3).
I can write one amount as a % of another amount (16.1 – 16.3).
I can calculate % discount.
I can calculate % increase.
I can calculate profit.
I can calculate loss.
I can calculate VAT on items.
I can interpret pie graphs and answer questions based on them.
I can draw a column graph.

Assessment

Learning Outcome 2: The learner will be able to recognise, describe and represent patterns and relationships, as well as to solve problems using algebraic language and skills.

Assessment Standard 2.6: We know this when the learner describes a situation by interpreting a graph of the situation, or draws a graph from a description of a situation (e.g. height of a roller-coaster car over time; the speed of a racing car going around a track);

Learning Outcome 5: The learner will be able to collect, summarise, display and critically analyse data in order to draw conclusions and make predictions, and to interpret and determine chance variation.

Assessment Standard 5.8: We know this when the learner draws a variety of graphs by hand/technology to display and interpret data (group and ungrouped) including:

5.8.3 pie charts;

Assessment Standard 5.9: We know this when the learner critically reads and interprets data presented in a variety of ways to draw conclusions and make predictions.

Questions & Answers

are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Berger describes sociologists as concerned with
Mueller Reply
what is hormones?
Wellington
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Source:  OpenStax, Mathematics grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11075/1.1
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