Just one sec...
Hey there! Sign in to join this conversationNew here? Join for free

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

Announcements Posted on
Take our short survey, £100 of Amazon vouchers to be won! 23-09-2016
    • Thread Starter
    Offline

    0
    ReputationRep:
    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?
    Offline

    2
    ReputationRep:
    About 69% for 60% overall.

    http://www.wolframalpha.com/input/?i...+0.7*k+%3D+0.6
    • Thread Starter
    Offline

    0
    ReputationRep:
    Thank you, how about if I got 50% today? rather than 40%?
    Offline

    2
    ReputationRep:
    (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.

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

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.

Poll
Who will be the next permanent England boss?

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

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