You are Here: Home >< Chat

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

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.

Updated: May 16, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### Summer on a budget

How do you have a great summer on the cheap?

Poll
Useful resources

## Groups associated with this forum:

View associated groups
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.