Add 14/21 and 9/15
14/21 + 9/15 is 19/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
14/21 = 14 × 5/21 × 5 = 70/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
9/15 = 9 × 7/15 × 7 = 63/105 - Add the two like fractions:
70/105 + 63/105 = 70 + 63/105 = 133/105 - 133/105 simplified gives 19/15
- So, 14/21 + 9/15 = 19/15
In mixed form: 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/21+9/15 14/21+18/15 14/42+9/15 14/21+9/30 42/21+9/15 14/21+27/15 14/63+9/15 14/21+9/45 70/21+9/15 14/21+45/15 14/21+9/75 98/21+9/15 14/21+63/15