document.write( "Question 200061: add and subtract the following fractions.
\n" ); document.write( "2/3+5/7
\n" ); document.write( "3/4+7/12
\n" ); document.write( "4/9-1/8
\n" ); document.write( "

Algebra.Com's Answer #150440 by jerrybassmasta(14)\"\" \"About 
You can put this solution on YOUR website!
Adding and subtracting fractions are very simple, that is if yo know only one rule.
\n" ); document.write( "The rule is to have common denominators.\r
\n" ); document.write( "\n" ); document.write( "2/3+5/7
\n" ); document.write( "The common denominator for 3 and 7 will be 21. The easiest way is to just multiply them together.
\n" ); document.write( "So you have 21, then you ask yourself. How many times did 3 go into 21. (7 times) So you multiply 2 by 7 as well. Same for the other side. How many times does, 7 go into 21. (3 times) So you multiply 5 by 3.\r
\n" ); document.write( "\n" ); document.write( "Now you have.
\n" ); document.write( "14/21+15/21 Now you can add them as normal numbers. (Remember you don't add the denominators)\r
\n" ); document.write( "\n" ); document.write( "29/21
\n" ); document.write( "Reducing them are quite simple as well, all you do as subtract the top number from the bottom number.
\n" ); document.write( "1 and 8/21\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "3/4+7/12\r
\n" ); document.write( "\n" ); document.write( "Using the same steps you should start off with.
\n" ); document.write( "9/12+7/12
\n" ); document.write( "16/12
\n" ); document.write( "1 and 4/12 You can also simply simplify it to.....
\n" ); document.write( "1 and 1/3\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "4/9-1/8
\n" ); document.write( "32/72-9/72
\n" ); document.write( "21/72
\n" ); document.write( "7/24
\n" ); document.write( "
\n" );