Question

7 1/2:3 9/11-(11/49*21/22+ 3 3/4

Answer 1

7 1/2:3 9/11-(11/49*21/22+ 3 3/4)
7 1/2*1/3*9/11-(1/7*3/2+9/4)
7*1/2*3/11-(3/14+9/4)
21/22-69/28
-465/308
-1 157/308 или ≈-1,5