Lies, damn lies and statistics
Just goes to show how meaningless most statistics printed or reported are. Stating "10% of the operation" means absolutely nothing. How do you define "the operation", is it value of fraud, number of fraudulent transactions, number of people caught carrying out fraudulent transactions, etc., etc.
You'll find that many media sources (not just El Reg), quote meaningless statistics all the time, stats that *sound* as though they make sense, but when you actually stop to think about it mean less than nothing, and are just pretty window dressing to make the article seem as though there is actually some scientific analysis in there.
In fact I'd go so far as to say that 99% of articles quoting statistics are just plain nonsense.