Add 14/28 and 9/21
14/28 + 9/21 is 13/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
14/28 = 14 × 3/28 × 3 = 42/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84 - Add the two like fractions:
42/84 + 36/84 = 42 + 36/84 = 78/84 - 78/84 simplified gives 13/14
- So, 14/28 + 9/21 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+18/21 14/56+9/21 14/28+9/42 42/28+9/21 14/28+27/21 14/84+9/21 14/28+9/63 70/28+9/21 14/28+45/21 98/28+9/21 14/28+63/21