01
Have a go first
The Question
A school has 800 pupils and 45% of them are boys. 30% of the girls play a musical instrument. How many girls play an instrument?
02
Then check together
The Answer
Reveal the Answer
132
Boys are 360, so girls are 440. Then 30% of 440 = 132. The trap is taking 30% of 800. Say out loud what each percentage is a percentage of before calculating.
Now watch the solution
Pencil and paper
Practice Sheet + Marked Answers
The four-question practice sheet, the solutions in our teaching voice and a self-marking quiz for this question are part of The Question Desk course — every school day of the term, with progress you can see. Enrolled group students get it included.
Want a Plan Built Around Your Child, Not Just This Week’s Question?
Small groups of around 4–5 (max 8), matched to your child’s year group and pace. Start with the free baseline assessment and we’ll tell you exactly where they are.
