I’m not 100% certain but i’m pretty sure 1:3 works
The answer is 9 by the way. Draw a circle with sixty slices, shade in 15% or 9 slices.
5.73 so rounded up, it would be 6.
The answer to Q1 along with an explanation is shown in the picture;
Having a look at all the questions, they are all essentially the same type so can all be solved similarly;
So by following the method and explanation, you should be able to do the rest of the questions.
6 × 2 = 12 so 6 is the dilation factor
thus 4 × 6 is PQ which is 24