How many light bulbs might be in a full box?
Answer: 1/2 of the box of light bulbs was left.
What fraction of the box of light bulbs was left?
Answer: Any multiple of 12, because 1/4 and 1/3 have a common denominator of 12.
(1/3) * (3/4) = 3/12 = 1/4 used
4/4 - 1/4 = 3/4 left
To find the number of bulbs in a full box, you need a multiple of 3 and 4 which could be:
12, 24, 36, 48, etc.
Use multiples of 12 to find how many light bulbs are in a whole box.
