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

The video tutorial covers a percentage problem involving two singers, Celina and Zoe, who sing for different durations during an 80-minute band performance. The tutorial explains how to calculate the singing times for both singers using percentages and fractions, and how to determine the difference in their singing times. It emphasizes the importance of showing all calculations to gain full marks in exams and provides tips on presenting the final answer clearly. The marking scheme is also discussed, highlighting the allocation of marks for different parts of the solution.

What type of percentage problems are introduced at the beginning of the paper?

• Complex percentage problems

• Reverse percentage problems

• Straightforward percentage problems

• Percentage problems with variables

How many minutes did Selina sing?

• 50 minutes

• 48 minutes

• 55 minutes

• 52 minutes

What fraction of the 80 minutes did Zoe sing?

• 1/2

• 2/3

• 5/8

• 3/4

How many more minutes did Selina sing compared to Zoe?

• 5 minutes

• 3 minutes

• 2 minutes

• 4 minutes

How is the marking scheme divided for this problem?

• Two marks for the final answer, one mark for calculations

• All marks for the final answer

• One mark for the final answer, two marks for calculations

• One mark for each calculation and one for the final answer