Add 21/15 and 98/7
1st number: 1 6/15, 2nd number: 14 0/7
21/15 + 98/7 is 77/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
21/15 = 21 × 7/15 × 7 = 147/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
98/7 = 98 × 15/7 × 15 = 1470/105 - Add the two like fractions:
147/105 + 1470/105 = 147 + 1470/105 = 1617/105 - 1617/105 simplified gives 77/5
- So, 21/15 + 98/7 = 77/5
In mixed form: 152/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+98/7 21/30+98/7 21/15+98/14 63/15+98/7 21/45+98/7 21/15+98/21 21/75+98/7 21/15+98/35 21/15+98/49