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Foundation Maths Ratio and Proportion Presentation.

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  • Course
  • Maths
  • Institution
  • GCSE

42 slides reviewing the entire ratio, proportion and rates of change unit for GCSE Foundation maths. includes practice questions and solutions with step by step help on how to answer these questions in an exam. Made for a tutoring session with a year 11 student who is a visual learner so would be g...

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Document information

  • September 19, 2023
  • 42
  • 2023/2024
  • Presentation
  • Unknown

Subjects

  • ratio
  • proportion
  • rates of change
  • foundation maths
  • gcse maths
  • percentages
  • conversions

Written for

  • GCSE
  • GCSE
  • Maths
  • 1
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Content preview

ratio, proportion, and
rates of change
Section 44-53

,reducing ratios to their simplest form

 typical questions will require you to divide each side by the same thing
 for example, writing 15:18 in its simplest form
 the highest common factor for both numbers in 3 so we divide both sides by 3
 this leaves us with 5:6 which is the simplest form.

,trickier examples

 we may also be given examples with decimals involved
 for example, 2.4:3.6
 in this case we multiply the numbers by 10, to make them whole numbers,
24:36
 from here we follow the same process of finding the highest common factor
and dividing it
 ANSWER:
 2:3

, tricker examples

 we also may have to deal with mixed units
 for example, 24mm:7.2cm
 in this case we have to put them in the same unit, ideally we want to get rid
of the decimal to make it easier for us later on
 this will leave us with 24mm:72mm
 we can now cancel this down as normal
 this leaves us with 1:3

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