From April to July 2015, the number of employed youth 16 to 24 years old rose by 2.1 million to 20.3 million and youth unemployment increased from 2.1 million to 2.8 million. In July, the youth labor force grew by 2.8 million to a total of 23.1 million and the youth population was 38.5 million.

How did the youth unemployment rate change from April to July? Calculate the youth labor force participation rate in July.