Unemployment in Britain for the three months ending in September held steady at 7.7 percent, unchanged from the level reported a month earlier. The Office for National Statistics said Wednesday that the number of people claiming unemployment benefits fell by 3,700 to 1.47 million. The number of people with jobs rose to 29.2 million, 286,000 higher than a year earlier. The number of people working part-time because they could not find full-time employment rose by 67,000 in the three months to a record high of 1.15 million. 