Respuesta :
6/12+3/12 = 9/12
To simplify you divide both the denominator and nominator by 3.
9/12 = 3/4
To simplify you divide both the denominator and nominator by 3.
9/12 = 3/4
The fraction simplify to 9-12 but then it still simplify buy dividing the top and bottom number by 3. So your finally answers is 3/4