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- by onesixeight
Mon Jan 26, 2009 9:16 pm- Forum: Problem Solving
- Topic: Help with Fraction Problem...
- Replies: 6
- Views: 2206
I'm almost embarrassed to ask, but how did you get this part:
Y/4=6/7*(X-Y)/(8)
56Y=24X-24Y
Could you explain how 8 got cross multiplied with 7, and 6 and 4 on the other side.
Thanks!
- by onesixeight
Sun Jan 25, 2009 3:55 pm- Forum: Problem Solving
- Topic: Help with Fraction Problem...
- Replies: 6
- Views: 2206
Help with Fraction Problem...
I'm not sure where I got this problem from, but I have difficulty with these type of fraction problems. A student took 12 tests. The student's average (arithmetic mean) on the first 4 tests was 6/7 of the student's average on the final 8 tests. What fraction of the total number of points that the st...
- by onesixeight
Sun Jan 25, 2009 11:32 am- Forum: Problem Solving
- Topic: Help with Fraction Problem...
- Replies: 6
- Views: 2206