Can someone me with these question

1. leonard spent 1/4 of his money on a sandwich. he spent to time as much on a gift for his brother as on some comic books. he had 3/8 of his money left. what fraction of his money did he spend on the comic books?

2. christine baked a pumpkin pie. she ate 1/6 of the pie. her brother ate 1/3 of it and gave the leftovers to his friends. what fraction of the pie did he give to his friends?

3. liang went to the bookstore. he spent 1/3 of his money on a pen and 4/7 of it on books. what fraction of his money did he have left?