I need help with these two math problems plz. Show your work

9\16 + 3\4= 1 5/16for 1 and this answer is 1 5/16 7 1/3 - 9 = 1 2/3 for 2 so the answer is 1 2/3 I think let me know

9/16 x 3/4 = 27/64 9 - 7 1/3 = 2 1/3