3/8 cannot be simplified anymore, because 3 doesn't go into 8. Therefor 3/8 is the simplest form. Hope this helps!
A. 305
b. 900
c. 46
d. 157,019
A yard stick would be used
B.
4 goes into 75 18 times and has a remainder of 3, so it’s 18 3/4
165 trees
Hope this helps you out!