Add 40/14 and 21/30
1st number: 2 12/14, 2nd number: 21/30
40/14 + 21/30 is 249/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 14 × 15 = 210,
40/14 = 40 × 15/14 × 15 = 600/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Add the two like fractions:
600/210 + 147/210 = 600 + 147/210 = 747/210 - 747/210 simplified gives 249/70
- So, 40/14 + 21/30 = 249/70
In mixed form: 339/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/14+21/30 40/14+42/30 40/28+21/30 40/14+21/60 40/14+63/30 40/42+21/30 40/14+21/90 40/70+21/30 40/98+21/30