Batman AA sells MORE on Xbox 360 in UK (by 10%); tops charts

[Reasonable]

^^

Not really. We know the sales split - 360 got 55% PS3 45%. But the amount more will depend on the actual units. You could plug in lots of different numbers and still have 55% and 45%

For example:

360 sells 55 units, PS3 45 units and 360 sells 10 units more
360 sells 110 units, PS3 90 units and 360 sells 20 units more

Don't worry - I've got Physics, Mathematics and Statistics qualifications and I mess up percentages sometimes. Everyone does in my experience - I've even seen (briefly) some MIT Phd mathematicians have to correct themselves regarding percentages.