Add 15/21 and 14/30
15/21 + 14/30 is 124/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
14/30 = 14 × 7/30 × 7 = 98/210 - Add the two like fractions:
150/210 + 98/210 = 150 + 98/210 = 248/210 - 248/210 simplified gives 124/105
- So, 15/21 + 14/30 = 124/105
In mixed form: 119/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+14/30 15/21+28/30 15/42+14/30 15/21+14/60 45/21+14/30 15/21+42/30 15/63+14/30 15/21+14/90 75/21+14/30 15/21+70/30 15/21+98/30