32 players showed up for practice today.

1/4 of the players are 9 years old.
1/2 of the players are 10 years old.
The final 1/4 of the players are 11 years old.

What fraction of 32 players are 10 years old 1/2 = blank/32

If 1/2 of the players are 10 years old, then the fraction of 10-year-old players out of 32 total players is 1/2 * 32 = <<1/2*32=16>>16/32.