1. Where is the maths in social media?
Convert from standard form to ordinary numbers
Represent ordinary numbers in standard form

2. https://youtu.be/jottDMuLesU

3. New Topic: Percentages 07/02/2020
Express numbers as fractions and percentages using a calculator
Express numbers as percentages without a calculator

4. Examples Average daily use of the internet on PC or tablet – 4hours
Number of facebook users worldwide 1.5billion (total population of world 7.4billion)

5. You Try Average daily use of the internet on phone – 2hours
Number of twitter users worldwide 325 million.

6. Task One: Rewrite these sentences using percentages (calculator)
The number of people who use Instagram who are under 35: 360,000,000
The number of people who are actively members of Twitter – 325,000,000
164million users of Instagram are aged between 16 and 24.
Number of Twitter users who have never tweeted 572 million.
Number of fake “bot” Instagram accounts is 32 million.
The number of Twitter users who don’t log in each month – 500 million
Why couldn’t you write this sentence:
The number of Americans with Instagram by 2018 is predicted to be 106 million
1.3billion
1,300,000,000
400million

7. A marketing agency looks at the clicks on one Facebook advert during one hour on two different days. The first day the advert was seen 2500 times times it was clicked on. The second day it was seen 2000 times times it was clicked on. How do they turn this data into fractions and percentages without a calculator?

8. Writing as a fraction and percentage
First we express the problem as a fraction.
𝐶𝑙𝑖𝑐𝑘𝑠 𝑇𝑜𝑡𝑎𝑙 𝑣𝑖𝑒𝑤𝑠 =
Then we simplify the fraction =
Then we turn this into a percentage
We say “400 is ths of 2500” or “400 is _____% of 2500”.
Which sounds better?

9. We say “340 is ths of 2000” or “340 is _____% of 2000”.
You try: Writing as a fraction and percentage.
The second day it was seen 2000 times. 340 times it was clicked on.
First we express the problem as a fraction.
𝐶𝑙𝑖𝑐𝑘𝑠 𝑇𝑜𝑡𝑎𝑙 𝑣𝑖𝑒𝑤𝑠 =
Then we simplify the fraction =
Then we turn this into a percentage
We say “340 is ths of 2000” or “340 is _____% of 2000”.
Which sounds better?

11. Which class has a greater proportion of Twitter users?
3 Part Plenary
In class A of 28 pupils, 12 of them have Twitter. Express this as a percentage using a calculator.
In class B there are 40 pupils, 14 of them have Twitter. Express this as a percentage without a calculator
Which class has a greater proportion of Twitter users?

12. Challenges
Marcus is writing a report for his company. His company makes a profit of £8,000 in December. He wants to write this as percentage of the company’s total annual profit of £40,000. He writes that “In December the company earned 5% of its annual profit”. Marcus has made a mistake. Explain what he has done wrong and re-write his report. A B C D 1
Item
Price in London
Price in Paris
Price in London as a percentage of price in Paris 2
Nike Air Jordans
£85
£92.50 3
Men’s Diesel Jeans
£90
£105.29 4
Samsung S5
£325
£349.99 5
LG 42” LED TV
£280
£322.64
Complete column D with the price in London as a percentage of the price in Paris. Ext: Do you know the formula to use in Excel to get it to calculate this automatically?
Ext2: What changes if you calculate the price in Paris as a percentage of price in London

14. Turing
Brahmagupta
Lovelace
Germain
AQA foundation
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