54 cups of juice from a bottles how many bottles does it take to fill one cup

There are 54 cups of juice from one bottle.

54/54 makes one bottle of juice.

However, you are trying to find out how much bottles are needed to fill one cup.

54 - 1 = 53

Place 53 over the total amount (54)

53/54 is the amount not used

subtract it from 54/54

54/54 - 53/54 = 1/54

1/54ths of a bottle is used to fill one cup

hope this helps