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# Rep for anyone who can answer my basic percentages question please!

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1. If I somehow managed to scrape 40% in an exam I just took, which is worth 30% of overall IGCSE, then how much % do i need to get in tomorrows (worth 70% of overall IGCSE) to get a C or (60%) overall?
2. About 69% for 60% overall.

http://www.wolframalpha.com/input/?i...+0.7*k+%3D+0.6
3. Thank you, how about if I got 50% today? rather than 40%?
4. (Original post by Lil-Lele)
Thank you, how about if I got 50% today? rather than 40%?
The formula you are looking at is 0.3 times your mark today plus 0.7 times your mark in the next exam gives you your total mark. You can rearrange this for whatever variable most concerns you, or if you put it into Wolfram Alpha in the form I linked you to it will just tell you. In this instance, the formulation would be 0.3 * 50 + 0.7 * k = 60, where 50 is your mark today, k is your mark next time and 60 is the mark you hope to get overall. Solving for k will answer your question now, and swapping numbers for variables will answer any other questions you may have.

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