document.write( "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. \n" ); document.write( "

Algebra.Com's Answer #624963 by fractalier(6550) $\"\"$ $\"About$

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.
\n" ); document.write( "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.
\n" ); document.write( "Here, we are given the average and one of the numbers.
\n" ); document.write( "Let us call the missing number x.
\n" ); document.write( "Then we have
\n" ); document.write( " $\"%28%283%2F2%29+%2B+x%29+%2F+2+=+7%2F8\"$
\n" ); document.write( "To solve this, and find x, let us multiply both sides by 2 and get
\n" ); document.write( " $\"%28%283%2F2%29+%2B+x%29+=+7%2F4\"$
\n" ); document.write( "Then we subtract 3/2 from both sides and get
\n" ); document.write( "x = 7/4 - 3/2 = 7/4 - 6/4 = 1/4
\n" ); document.write( "The missing number is 1/4. \n" ); document.write( "

\n" );