SOLUTION: the average of two fractions is 7/8 and one fraction is 3/2.what is the other fraction.pls help on how to do this that could be understand by a grade 5 pupil.thanks and more power.
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Question 1009486: the average of two fractions is 7/8 and one fraction is 3/2.what is the other fraction.pls help on how to do this that could be understand by a grade 5 pupil.thanks and more power. Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! To find the average of ANY two numbers, you add them together and then divide by two.
For example, if we wanted the average of 5 and 9, we would add them to get 14 and then divide that by 2, giving an average of 7.
Here, we are given the average and one of the numbers.
Let us call the missing number x.
Then we have
To solve this, and find x, let us multiply both sides by 2 and get
Then we subtract 3/2 from both sides and get
x = 7/4 - 3/2 = 7/4 - 6/4 = 1/4
The missing number is 1/4.
