Add 16/15 and 7/21
1st number: 1 1/15, 2nd number: 7/21
16/15 + 7/21 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
16/15 = 16 × 7/15 × 7 = 112/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
7/21 = 7 × 5/21 × 5 = 35/105 - Add the two like fractions:
112/105 + 35/105 = 112 + 35/105 = 147/105 - 147/105 simplified gives 7/5
- So, 16/15 + 7/21 = 7/5
In mixed form: 12/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/15+7/21 16/15+14/21 16/30+7/21 16/15+7/42 48/15+7/21 16/45+7/21 16/15+7/63 80/15+7/21 16/15+35/21 16/75+7/21 16/15+49/21