Answer:
3 boxes
Explanation:
First, calculate how many oz in one pound: 16 oz = 1 pound
Now we know that our situation includes smaller to larger.
Since we are going smaller to larger, we need to multiply.
You should multiply 20 x 3 = 60 oz from what I learned.
60 oz = 3.75 pounds. In another situation you would round, but who cares about rounding. Your answer is 99.100% correct
If this was wrong, I'm sorry. The way I learned is smaller to larger: multiply; larger to smaller: divide.
Hopefully, this was right!