1. Numeracy Ninjas Starter

2. What is this infographic showing us?
Why are there different numbers for each social media site?
Are there 400 hours of video uploaded to youtube each year?
Higher Order Thinking:
Who uses this information?
Note: 2.46million = 2,460,000
(6 places between the 2 and the decimal)

3. Percentage Change Tuesday, 05 February 2019
Calculate percentage change with a calculator

4. Percentage Change The formula for this is 𝐶ℎ𝑎𝑛𝑔𝑒 𝑂𝑟𝑖𝑔𝑖𝑛𝑎𝑙 x 100
Normal price £45
Launch price £350
Current price
£285
Gold Edition
£80

5. Companies designed to increase social media profiles
Use your new skills to build a “portfolio” of celebrities that your company has helped to improve their followers. The portfolio should have actual increase in numbers and percentage increases.
Name
Kim Kardashian - 22,700,000 63,560,000
Beyonce – 21,770, ,940,000
Ariana Grande – 20,648,615 63,080,000
Justin Bieber – 20,460, ,500,000
Taylor Swift – 16,249, ,130,000
Rihanna – 13,411, followers
Has the celebrity with the biggest increase in followers also had the largest percentage increase? Why? Why not?

6. By how many percent has the value of the shares increased
Alina bought some stocks and shares last year. She invested £2000. After a year they are now worth £2,700.
By how many percent has the value of the shares increased
Jim bought his car last year. It cost him £14,500 brand new. After a year it is now worth £12,600.
By how many percent has the price decreased

7. Justify why the percentage increase and decreases are different
For the following questions, imagine you have travelled back in time. Calculate the percentage decreases:
1. The percentage decrease in hours uploaded to Youtube every 60 seconds between 2015 and 2014.
2. The percentage decrease from 2015 to 2013 in the number of Facebook posts every 60 seconds.
3. The percentage change in Instagram photos uploaded every 60 seconds between and 2014.
4. The percentage change in twitter tweets every 60 seconds between 2015 and
5. The percentage change in WhatsApp messages sent every 60 seconds between and 2014.
Calculate the following:
1. The percentage increase in hours uploaded to Youtube every 60 seconds between and 2015.
2. The percentage increase from 2013 to 2015 in the number of Facebook posts every 60 seconds.
3. The percentage increase in Instagram photos uploaded every 60 seconds between and 2015
4. The percentage change in twitter tweets every 60 seconds between 2013 and
5. The percentage change in WhatsApp messages sent every 60 seconds between and 2015.
Justify why the percentage increase in Google searches made every hour between and 2015 is the same as the percentage increase every minute in the same time period.
Justify why the percentage increase and decreases are different

8. Justify why the percentage increase and decreases are different
For the following questions, imagine you have travelled back in time. Calculate the percentage decreases:
1. The percentage decrease in hours uploaded to Youtube every 60 seconds between 2015 and 2014.
2. The percentage decrease from 2015 to 2013 in the number of Facebook posts every 60 seconds.
3. The percentage change in Instagram photos uploaded every 60 seconds between and 2014.
4. The percentage change in twitter tweets every 60 seconds between 2015 and
5. The percentage change in WhatsApp messages sent every 60 seconds between and 2014.
Calculate the following:
1. The percentage increase in hours uploaded to Youtube every 60 seconds between and 2015.
2. The percentage increase from 2013 to 2015 in the number of Facebook posts every 60 seconds.
3. The percentage increase in Instagram photos uploaded every 60 seconds between and 2015
4. The percentage change in twitter tweets every 60 seconds between 2013 and
5. The percentage change in WhatsApp messages sent every 60 seconds between and 2015.
33. 3 % increase
25% decrease
34.1% increase
25.5% decrease
32.2% increase
24.3% decrease
51.9% increase
34.2% decrease
28% increase
21.8% decrease
Justify why the percentage increase in Google searches made every hour between and 2015 is the same as the percentage increase every minute in the same time period.
Justify why the percentage increase and decreases are different

9. Francesca used to earn £350 per week. Her pay rises to £363. 13
Francesca used to earn £350 per week. Her pay rises to £ Frank used to earn £320. His pay rises to £ Who has had the greatest percentage increase?
A car costs £9750 when new. 5 years later it is sold for £4500. What is the average percentage decrease each year?

10. Easier

11. Answers