1. To Assess my Understanding of Percentages 14-Nov-18
Today’s Title.
Today’s Date
To Assess my Understanding of Percentages
14-Nov-18
To Assess my Understanding of
Percentages
? / 09 / 15
Copy down the Title and Date and underline them.
Starter Activity
Complete the ‘Heard the Word Grid.’
Are there any key words that you have learnt or have a better understanding of now than you did at the start of this unit of work?

2. 5 4 3 2 1
Percentages
I can find simple percentages of an amount, e.g. 25%, 50%, 75%, 10%
I understand percentage as ‘number of parts per hundred’.
I can calculate any percentages of an amount, using either calculator or non-calculator methods.
I can compare two quantities using percentages.
I can express one quantity as a percentage of another.
I can work with percentages greater than 100%
I can find the outcome of a given percentage increase or decrease.
I can calculate the original price when I know the new price and the percentage increase / decrease.
I can solve problems involving, for example compound interest and population growth using multiplicative methods.

3. Percentage Increase Decrease Original Amount Simple Interest
Key Words / symbols
Never heard before?
Heard of but not sure what it means?
Know what it means and can explain it in context
Jot down your ideas here...
Percentage
Increase
Decrease
Original Amount
Simple Interest
Compound Interest
Print slides 3-10, two to a page on white paper.

4. Calculate the following percentages of 360:-
Questions
Answers
Fluency
Calculate the following percentages of 360:-
50%
25%
75%
10%
Problem Solving
Jim's pay is £180 each week.
Jim asks his boss for an increase of £20 a week.
Jim's boss offers him a 10% increase.
Is the offer from Jim's boss more than Jim asked for?
You must show your working.
Reasoning
“To find 10% you have to divide by 10. So to find 25% you have to divide by 25.”
True of False?
You must explain your answer.

5. Calculate 22% of 520 without using a calculator.
Questions
Answers
Fluency
Calculate 22% of 520 without using a calculator.
You must show your working out.
Problem Solving
Mr Mason asks 240 Year 11 students what they want to do next year.
15% of the students want to go to college.
3⁄4 of the students want to stay at school.
The rest of the students do not know.
Work out the number of students who do not know.
Reasoning
True of False?
“10% is the same as 1/10 so 20% must be the same as 1/20.”

6. You must show all your working out.
Questions
Answers
Fluency
Decrease £630 by 23%
You must show all your working out.
Problem Solving
Ria is going to buy a caravan.
The total cost of the caravan is £7000 plus VAT at 20%.
Ria pays a deposit of £3000
She pays the rest of the total cost in 6 equal monthly payments.
Work out the amount of each monthly payment.
Reasoning
True or False?
“When you want to increase an amount by a percentage, you always multiply by a number above 1.”
Explain your answer.

7. An amount was increased by 8% to £118.80. Find the original amount.
Questions
Answers
Fluency
An amount was increased by 8% to £ Find the original amount.
Problem Solving
There was a 25% discount in a sale. A boy paid £30 for a pair of jeans in the sale. What was the original price of the jeans?
You must show your working out.
Reasoning
“In a 12% off sale a TV costs £460.
10% of 460 = 46
1% of 460 = 4.6
2 % of 460 = 9.2
= 55.2
= £515.20
Before the sale the TV cost £515.20”
True or False. You must explain your answer.

8. Calculate £480 earning 6% compound interest for 2 years.
Questions
Answers
Fluency
Calculate £480 earning 6% compound interest for 2 years.
Reasoning
Convince me that using powers is the most efficient way of solving problems involving compound interest.

9. Question
Answer
Problem Solving
Viv wants to invest £2000 for 2 years in the same bank. At the end of 2 years she wants to have as much money as possible. Which bank should she invest her money in?

10. Use the space below to set yourself a question similar to the ones you were able to answer confidently.
Use the space below to answer the question that you have set yourself
My own question…
My answer…

11. 5 4 3 2 1
Percentages
I can find simple percentages of an amount, e.g. 25%, 50%, 75%, 10%
I understand percentage as ‘number of parts per hundred’.
I can calculate any percentages of an amount, using either calculator or non-calculator methods.
I can compare two quantities using percentages.
I can express one quantity as a percentage of another.
I can work with percentages greater than 100%
I can find the outcome of a given percentage increase or decrease.
I can calculate the original price when I know the new price and the percentage increase / decrease.
I can solve problems involving, for example compound interest and population growth using multiplicative methods.
Dialogue marking sheet. Print this slide and the next slide two to a page on purple paper.

12. My teachers probing question
My answer
What I will do to act upon my ‘Even Better If’’ comment
Strategy
Tick the strategy you will use.
Complete a mymaths lesson or booster pack
Use a revision guide or text book
Ask my teacher to explain during a lesson
Ask a peer to explain during a lesson
Ask someone at home to help
Attend a revision session at school
Attend homework club
Something else (describe your strategy here)
Dialogue marking sheet. Print this slide and the previous slide two to a page on purple paper.