Calculate U6 from the following data:

Total Population: 300 million

Children younger than 16: 45 million

Institutionalized: 2 million

Retirees: 12 million

Working full-time: 105 million

Working part-time: 15 million

Working part-time but want to be working full time: 3 million

Unemployed: 10 million

Marginally attached: 5 million

Enter your answer as a percentage to the nearest tenth, e.g. enter 12.3 for 12.3%

Please show the formula used