Add 9/14 and 21/15
1st number: 9/14, 2nd number: 1 6/15
9/14 + 21/15 is 143/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 14 × 15 = 210,
9/14 = 9 × 15/14 × 15 = 135/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
21/15 = 21 × 14/15 × 14 = 294/210 - Add the two like fractions:
135/210 + 294/210 = 135 + 294/210 = 429/210 - 429/210 simplified gives 143/70
- So, 9/14 + 21/15 = 143/70
In mixed form: 23/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/14+21/15 9/14+42/15 9/28+21/15 9/14+21/30 27/14+21/15 9/14+63/15 9/42+21/15 9/14+21/45 45/14+21/15 9/70+21/15 9/14+21/75 63/14+21/15 9/98+21/15