GCSE Secondary Maths Age 13-17 - Number: Estimating - Explained

The video tutorial explains how to determine which of two ovens has a greater normal price by using reverse percentage calculations. It begins with an introduction to the sale prices of microwave and combination ovens, followed by a detailed explanation of reverse percentages in the context of exam questions. The tutorial then demonstrates the calculation of the normal prices for both ovens, concluding with a summary of the solution and the allocation of marks for each step.

What is the sale price of the microwave oven?

• £90.00

• £135.00

• £140.00

• £84.00

How much of the original price is left after a third is taken off?

• 1/3

• 1/2

• 2/3

• 3/4

What is the normal price of the microwave oven?

• £84.00

• £135.00

• £90.00

• £140.00

What percentage of the original price does the sale price of the combination oven represent?

• 70%

• 60%

• 50%

• 40%

Which oven has the greater normal price?

• Microwave oven

• Combination oven

• Cannot be determined

• Both have the same price