Hi, first of all thank you very much for the website, it is really useful.

I have a question regarding the methodology while doing the math computations during cases. I know the best approach is to tell the interviewer what you want to do, guide the interviewer while doing computations and finally making conclusions.

The thing is that most times I get really confused or make no-sense math errors because I am concentrating too much in walking the interviewer through it rather than doing the math computations correctly (especially when several calculations need to be done). I wanted to know if the following methodologies are ok and which one would be better:

a) Explain what you want to do, ask for time to do the computations and finally make conclusions

b) Ask for time, do the computations, walk the interviewer through them and make conclusions.

Thank you very much. I´ll be happy to hear your suggestions.