The chances Greece will leave the euro this year now look greater than ever, UK bookmaker William Hills said on Wednesday. The latest odds of 5/4 imply a roughly 45 percent chance of so-called "Grexit" before the end of the year, compared with odds of 6/4, or 40 percent probability, earlier this week. It is offering odds of 4/7 that Greece will still be in the Eurozone on January 1 next year, implying a probability of around 64 percent.