Well she counts as a person so there are currently 78 people attending
125- 78 = 47 people
Answer:
Sorry my HANDWRITING is not good . :(
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Explanation:</h2><h2 />
In order to solve this problem, we have the box shown below. We know that:
The volume of a box of juice:
![V=15\times 10.5\times 20=3150cm^3 \\ \\ \\ *Recall \ 10\frac{1}{2}=10+\frac{1}{2}=10.5](https://tex.z-dn.net/?f=V%3D15%5Ctimes%2010.5%5Ctimes%2020%3D3150cm%5E3%20%5C%5C%20%5C%5C%20%5C%5C%20%2ARecall%20%5C%2010%5Cfrac%7B1%7D%7B2%7D%3D10%2B%5Cfrac%7B1%7D%7B2%7D%3D10.5)
So:
![\text{If in 1 day he drinks}-----> 630cm^3 \\ \\ \text{x days}-----------> 3150cm^3 \\ \\ \\ So: \\ \\ x=\frac{3150}{630}=5days](https://tex.z-dn.net/?f=%5Ctext%7BIf%20in%201%20day%20he%20drinks%7D-----%3E%20630cm%5E3%20%5C%5C%20%5C%5C%20%5Ctext%7Bx%20days%7D-----------%3E%203150cm%5E3%20%5C%5C%20%5C%5C%20%5C%5C%20So%3A%20%5C%5C%20%5C%5C%20x%3D%5Cfrac%7B3150%7D%7B630%7D%3D5days)
Finally, Bruce will need 5 days in order to drink the box juice
In this question, the thing that needs to be found is the number whose 20% would be 18. The information's required for getting to the solution are already provided in the question. based on those given information's, the answer can be deduced very easily.
Let us assume the unknown number to be = x
Then
(20/100) * x = 18
x/5 = 18
x = 18 * 5
= 90
so the unknown number in the question is 90. I hope the procedure is clear enough for you to understand.