Which is what we discussed in the workgroup. So tried it again...

I was looking at this with a workgroup a few weeks back. It worked quite nicely with a bar model and setting up of an equation. But we didn't explore pure multiplicative reasoning as above. I wondered if Andrews method was generalisable to all problems of this type...

He is probably closest to the Charli XCX definition. However, I'm not sure it's what you want in a politician (or PM!)