Facebook Inc increased its revenue 61 percent in the second quarter, beating Wall Streets target as the Internet company benefited from strong demand for its mobile advertising business. Shares of Facebook were up 56 cents at $71.85 in after-hours trading on Wednesday. Facebook said that mobile advertising revenue represented 62 percent of its ad revenue in the second quarter, up from 41 percent in the year-ago period and 59 percent in the first quarter of 2014. Facebook posted $791 million in net income, or 30 cents a share, compared with $333 million or 13 cents a share in the second quarter of 2013.