Question

I need help with questions 11 12 15 and 16 please simplify :( convert if necessary

Answer 1

11) 14/5
12) 21/1
15) 4/1
16) 21/2 I hope this is correct

Answer 2

11) 2 4/5
12) 12
15) 2 6/7
16) 5 1/4