1. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Fractions Decimals Percentages www.mathsrevision.com Conversion between % Fractions and Decimals Finding a Percentage with a Calculator Finding a Percentage without a Calculator

2. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Starter Questions www.mathsrevision.com

3. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Percentages www.mathsrevision.com Learning Intention Success Criteria 1.To understand the process of how to calculate a percentage without a calculator. 1.We are learning how to calculate a percentage without a calculator. 2.Be able to calculate a percentage without a calculator. Without a Calculator

4. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Percentages www.mathsrevision.com To working out a simple percentage it is easier to use the fraction equivalent. You should already know Without a Calculator

5. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Percentages www.mathsrevision.com Without a Calculator

6. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com Find 25% of £40 Percentages 1 0 = 10 = Without a Calculator “of” means multiple

7. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com Find 75% of £300 Percentages 7 5 2 2 5 = 225 = Without a Calculator

8. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com For more difficult percentages use this method. Percentages Find 15% of 360 10 % → 36 5 % → 18 ÷ 2 15 % → 54 Without a Calculator

9. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com Percentages Find 12% of 240 10 % → 24 1 % → 2.4 x 2 12 % → 28.8 2 % → 4.8 Without a Calculator

10. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com Percentages Find 3.5% of 1200 1 % → 12 3 % → 36 x 3 3.5 % → 42 0.5 % → 6 ÷ 2 Without a Calculator

11. MNU 3-07a 2-Jun-16Created by Mr. Lafferty Maths Dept. Now try TJ3a Ex 1 Ch6 (page 46) www.mathsrevision.com Percentages Without a Calculator

12. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Starter Questions www.mathsrevision.com

13. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Percentages www.mathsrevision.com Learning Intention Success Criteria 1.To know how to calculate a percentage using a calculator. 1.We are learning to calculate a percentage of a quantity using a calculator. 2.Show working. With a Calculator

14. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Remember money 2 decimal places Find 17% of £450 Percentages of means multiple www.mathsrevision.com With a Calculator

15. MNU 3-07a www.mathsrevision.com 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Remember !! money 2 decimal places Find 4% of £70 Percentages With a Calculator

16. MNU 3-07a 2-Jun-16Created by Mr. Lafferty Maths Dept. Now try TJ3a Ex 2 Ch6 (page 48) www.mathsrevision.com Percentages With a Calculator

17. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com

18. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. Percentages www.mathsrevision.com Learning Intention Success Criteria 1.To know how to convert a fraction to a percentage. 1.We are learning to convert a fraction to a percentage and use them in context. 2.Be able to compare percentages in context. Comparing Percentages

19. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com Converting a fraction to a percentage Percentages Comparing Percentages FractionDecimalPercentage Do the divisionx 100 0.7575% Do the divisionx 100

20. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com Write the following fractions as percentages. = 27% = 29% = 15% Percentages Comparing Percentages

21. MNU 3-07a 2-Jun-16Compiled by Mr. Lafferty Maths Dept. www.mathsrevision.com Paul scored : 24 out of 30 in English and 36 out of 40 in Maths. By finding the percentage score for each, which is his best subject ? Percentages EnglishMaths Comparing Percentages

22. MNU 3-07a 2-Jun-16Created by Mr. Lafferty Maths Dept. Now try TJ3a Ex 3 Ch6 (page 48) www.mathsrevision.com Percentages Comparing Percentages