To add fractions you find the LCD of the two fractions and then you add the numerator, remember DON'T ADD THE DENOMINATORS!!!! Then you simplify the fraction and put it in simplest form.
Ex.: To find the sum of 3/4 + 7/12 you find the LCD,
4's multiples: 4, 8, 12, 16, 20, 24
12's multiples: 12, 24, 36, 48
The LCD of 3/4 and 2/12 is 12 so 4 x 3 is 12 so you have to do the same thing with the numerator and 3 x 3 is 9 so 3/4 becomes 9/12 and 2/ 12 stays the same because 12 x 1 is 12 and 2 x 1 is 2 and you addition problem becomes 9/12 + 2/12. To add it you only add the numerators and you keep the denominators the same. So you add the numerators, 9 + 2 = 11 and the denominators stay the same so the answer is 11/12.
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