Answer:
In converting a mixed number to an improper fraction, you would have to multiply the denominator to the whole number, once you do that you have to add the product to the numerator. The denominator would still stay the same.
A. 1 7/16 = 23/16
B. 11 5/9 = 104/9
C. 30 5/7 = 215/7
D. 10 10/13 = 140/13
E. 24 3/5 = 123/5
F. 129 1/2 = 259/2
~hope this helps~