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Experiences and Outcome : MNU 2-07a I have investigated the everyday contexts in which simple fractions, percentages or decimal fractions are used and can carry out the necessary calculations to solve related problems. Success Criteria How to do it: I can identify the percentage symbol The percentage sign is % I can change Divide the percentage by 100 and simplify if possible. a percentage to a simple fraction 50% 25% = I can find a missing percentage 10% = Think of dividing the numerator and the denominator by the numerator. Subtract the percentage(s) from 100%. If the school is made up of 60% boys what percentage are girls? 100% – 60% = 40% I can find a simple percentage of a given amount Change the percentage to a simple fraction. 50% of £10 x £10 25% of 40g x 40 = £5 = 10g Think of the % divided by 100 Experiences and Outcome : MNU 2-07b I can show the equivalent forms of simple fractions, decimals and percentages and can choose my preferred form when solving a problem, explaining my choice of method. Success Criteria How to do it: I can change a simple percentage to a fraction or a decimal Divide the percentage by 100 and simplify if possible. I can choose my preferred form Change the percentage to a fraction or a decimal. 10% = = 0.1 25% of 40 x 40 = 40 ÷ 4 = 10 50% of 40 0.5 x 40 = 20 Think of 25% as Think of 50% as 0.5 Experiences and Outcome: MNU 3-07a I can solve problems by carrying out calculations with a wide range of fractions, decimals and percentages, using my answers to make comparisons and informed choices for real life situations. Success Criteria How to do it: I can calculate a percentage change Change the numbers given into a fraction, then multiply by 100%. A computer game costs £20. Its price goes up by £2. Calculate the percentage increase in price? increase £20 by £2 x = = 200 ÷ 20 = 10% Think of the change divided by the original number Ben weighed 50kg. He had a sickness bug and loses 10kg. Calculate the percentage decrease in his weight? x I can compare a percentage with a fraction or decimal = = 1000 ÷ 50 = 20% Change the fraction to a percentage. Last week a tin of Cadbury Heroes had the same price in two supermarkets. In one shop it now has 35% off and in the other it has off. Which has the better offer? x = = 200 ÷ 5 = 40% 40% is better than 35% I can order percentages, fractions and decimals Change each value to a percentage. Put these in order starting with the lowest value: , 20%, 0.3. = 25%, 0.3 = 30% 20%, 25%, 30% 20% , , 0.3 Experience and Outcome: MNU 4-07a I can choose the most appropriate form of fractions, decimal fractions and percentages to use when making calculations mentally, in written form or using technology, then use my solutions to make comparisons, decisions and choices. Success Criteria How to do it: % 1% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% I can recall a range of equivalent fractions, decimals and percentages Decimal 0.01 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 100% 1 I can find a percentage equivalent and/or complete a calculation using a calculator Fraction 1/100 1 /20 1/10 3/20 1/5 1/4 3/10 7/20 2/5 9/20 1/2 11/20 3/5 13/20 7/10 3/4 4/5 17/20 9/10 19/20 1 Divide the percentage by 100. Change 23% to a decimal 23 ÷ 100 = 0.23 Find 23% of £55? 23 ÷ 100 = 0.23 0.23 x 55 = £12.65 I can make an appropriate choice between using fractions, decimals and/or percentages with or without a calculator Without Calculator With Calculator Find 20% of 400g Find 15% of £88 20% = 15 ÷ 100 x 88 = £13.20 of 400 = 400 ÷ 5 = 80g