Add:
8/21 + 3/14
Is this correct?
(8+3=11)
(14+ 21=35)
=11/35
No. It is not correct. When adding fractions, you need to use a common denominator.
Please study my previous answer to this question.
http://www.jiskha.com/display.cgi?id=1248553775
8/21+3/14
21X4=84
14X6=84
8/84 + 3/84 =11/84
Is this correct?
No. You used a common denominator. But now you need to find the equivalent fractions. You multiplied 21 by 4 to get the denominator. You also need to multiply the numerator by the same number.
8/21 = 32/84
3/14 = 18/84
32/84 + 18/84 = 50/84 = 25/42
To add fractions, you first need to find a common denominator. In this case, the denominators are 21 and 14. The least common multiple (LCM) of 21 and 14 is 42.
To convert the fractions to have a common denominator of 42, multiply the numerator and denominator of the first fraction (8/21) by 2, and multiply the numerator and denominator of the second fraction (3/14) by 3. This gives us:
(8/21) * (2/2) = 16/42
(3/14) * (3/3) = 9/42
Now that both fractions have the same denominator, you can add their numerators:
16/42 + 9/42 = (16 + 9) / 42 = 25/42
So, the correct answer is 25/42.