LO: to recognise and understand the percent symbol. To write percentages as a fraction and decimal.
In order to answers these types of calculation, we will have to practise three key skills. Key skill 1:to understand what the word per cent means. Key skill 2:to recognise percentages as a fraction. Key skill 3:to be able to convert percentages to decimals.
Key skill 1:to understand what the word per cent means. We all see this sign everywhere but what does per cent or % mean?
Key skill 1:to understand what the word per cent means. P er cent means 'out of 100'.
Key skill 2:to recognise percentages as a Watch Me fraction. Look at my hundred square. How many parts are shaded? How many are not shaded? How would we write this as a fraction?
Key skill 2:to recognise percentages as a Watch Me fraction. There are 5 squares shaded. There are 95 squares not shaded. We can write this as 5 out of 100 5 5 There are _____ parts per hundred shaded. This is _____ %
Key skill 2:to recognise percentages as a fraction. Look at this hundred square How many parts are shaded? How many are not shaded? Ho would we write this as a fraction?
Key skill 2:to recognise percentages as a fraction. There are 35 squares shaded. There are 65 squares not shaded. We can write this as 35 out of 100 35 35 There are _____ parts per hundred shaded. This is _____ %
Key skill 2:to recognise percentages as a fraction. What percentage is shaded each time?
Key skill 2:to recognise percentages as a fraction. Answers 50 25 40 There are _____ parts per There are _____ parts per There are _____ parts per hundred shaded. This is hundred shaded. This is hundred shaded. This is 50 _____ % 25 _____ % 40 _____ %
Watch Me Key skill 3:to be able to convert percentages to decimals. This time we will work out what percentage is shaded and then use our knowledge of place value to convert the percentage into a decimal.
Watch Me Key skill 3:to be able to convert percentages to decimals. We have 20 parts of the hundred square shaded blue. We can write this as: 20 or 20% 100 We can then convert these into a decimal We have shown 20 0 . 2 0 hundredths/20% but we also know that 20/100 is the same as 2/10.
Watch Me Key skill 3:to be able to convert percentages to decimals. We have 89 parts of the hundred square shaded blue. We can write this as: 89 or 89% 100 We can then convert these into a decimal 0 . 8 9 We can show 89 hundredths/89% as 0.89
Key skill 3:to be able to convert percentages to decimals. We have 69 parts of the hundred square shaded blue. We can write this as: 69 or 69% 100 We can then convert these into a decimal We can show 69 0 . 6 9 hundredths/69% as 0.69
Key skill 3:to be able to convert percentages to decimals. Now try these:
Key skill 3:to be able to convert percentages to decimals. Now try these: 15% = 0.15 92% = 0.92
LO: to recognise and understand the percent symbol. To write percentages as a fraction and decimal. Reasoning/Problem Fluenc Solving y
Moving our learning on: For the first two questions, we need to consider what each of the shaded sections represent. On the third question, you will need to colour in 25% of the bar.
LO: to recognise and understand the percent symbol. To write percentages as a fraction and decimal. Reasoning/Problem Solving Fluenc y
Once you are ready, you can mark your answers.
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