Add 15/30 and 14/21
15/30 + 14/21 is 7/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
15/30 = 15 × 7/30 × 7 = 105/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
14/21 = 14 × 10/21 × 10 = 140/210 - Add the two like fractions:
105/210 + 140/210 = 105 + 140/210 = 245/210 - 245/210 simplified gives 7/6
- So, 15/30 + 14/21 = 7/6
In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30+28/21 15/60+14/21 15/30+14/42 45/30+14/21 15/30+42/21 15/90+14/21 15/30+14/63 75/30+14/21 15/30+70/21 15/30+98/21