Maths Year 8 Percentages Level 7

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Lesson
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 1 Recap calculating percentages without a calculator including simple increase or decrease by a percentage
           
  2 Discuss the most efficient way of calculating percentages of quantities with a calculator i.e. 35% of 125 = 0.35 x 125
Extend to the most efficient way of increasing a quantity by a percentage with a calculator (using multiplicative methods)
           
 3 Discuss the most efficient way of decreasing a quantity by a percentage with a calculator (using multiplicative methods) and recap % work so far
           
4
Express one number as a % of another number by converting a fraction to a fraction out of 100 (non-calculator)






5
Express one number as a % of another number by converting a fraction to a % using a calculator





6
Find percentage change with and without a calculator






7
Solve reverse percentage problems e.g. representing a 30% decrease by 70% and finding 100%






8
Solve reverse percentage problems using the reverse of the multiplicative method e.g. multiply by 0.7 to decrease by 30% so divide by 0.7 to undo






9
Revision of percentages