This could help with finding equivalent denominators to help find the solution: http://www.wyzant.com/resources/lessons/math/elementary_math/fractions/how_to_find_common_denominators
Math for dummies! http://www.dummies.com/how-to/education-languages/math.html
1st way: 12 x 21 = 252/2 = 126
Or 2nd way: 21/2 = 10.5 x 12 = 126
This link might be able to help you: http://www.virtualnerd.com/algebra-1/relations-functions/functions/function-notation/f-of-x-evaluation
Link to a good website to explain: http://www.wikihow.com/Multiply-Square-Roots
Sorry wrong post.
Now that you have the equation you can multiply instead of divide by multiply the resipricle of 3 which is 1/3.
So 3/2 * 1/3 = 3/6 = 1/2.
So the answer is 1/2.
Link to the history of the first civillization of math: http://www.math.tamu.edu/~dallen/masters/egypt_babylon/babylon.pdf
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