What is the quotient of 3/8 of 64 is divided by 2/5 of 15/16? (fraction word problem)

Do you mean (3/8 * 64) ÷ (2/5 * 15/16)

If that is the case, then, First you would do the parenthesis. 
3/8*64= 24, and 2/5 * 15/16 is 3/8.

So, You would divide24 ÷ 3/8=64
You have your answer, 64.

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.