hello there! The answer is A. 2/3
If you fully simplify 48/64, you get 3/4. Now, let's simplify the rest of the equations. If they are also 3/4, we know they are equivalent and not the answer.
A. 2/3 is already simplified as 2/3; & 2/3 ≠ 3/4 so this is NOT the correct answer
B. 6/8 simplified = 3/4; this is NOT the answer
C. 12/16 simplified = 3/4; this is NOT the answer
D. 45/60 simplified = 3/4; this is NOT the answer
I hope this helps and have a great day! :)