45% of Groupon's sales come from mobile devices

"Overall revenues grew by 8 per cent to $601m in the first quarter, ahead of the $589m that Wall Street had been expecting, while income from operations fell 47 per cent to $21m. Before compensation costs, the company reported net income per share of 3 cents, in line with forecasts.
Mr Lefkofsky pointed to growth in local revenues from the fourth quarter of last year, as well as margin improvement, as encouraging signs for the company’s future. Groupon also said that 45 per cent of its transactions came from mobile devices, confirming the growing importance of mobile in its business mix."

Source:  Financial Times, 8th May 2013