Crumpet this is how I figure it.
UK = 33,360
France= 30,370
Uk 2,990 more than France
2,990 / 30,370 = 9.845% or 0.0984524
The proof the answer is 9.845% is multiply 0.0984524 x 30,370
the answer to that is 2989.9993 which you round up to 2990 which is the difference between the UK and France
The answer is 0.0984524 another way of expressing this is 9.8%
Take the 2990 and add it to the 30,370 that gives you 33,360