## Calculating the percentage of silica

1. The problem statement, all variables and given/known data
A partially dried clay mineral contains 8% of water, the original sample contained 12% water and 45% silica. Then, the percentage of silica in the partially dried sample is nearly?

2. Relevant equations
Don't know if this is would help in the calculation,
in the original sample, 12% water is present, hence non water components are consisting of 88%

3. The attempt at a solution
Attempted one but was out of range of the concept to be used.

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 Blog Entries: 27 Recognitions: Gold Member Homework Help Science Advisor hi xiphoid! hint: suppose the original sample was 100 g (12 g water, 45 g silica, 43 g other stuff)

I had that stuff in my mind but couldn't manage to calculate further
 Quote by tiny-tim hi xiphoid! hint: suppose the original sample was 100 g (12 g water, 45 g silica, 43 g other stuff)

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## Calculating the percentage of silica

 Quote by xiphoid I had that stuff in my mind but couldn't manage to calculate further
ok, after the sample has dried, the water is less but everything else is the same

so call it x g water, 45 g silica, 43 g other stuff, …
from the question, what equation can you find for x ?