Add 2/7 and 81/30
1st number: 2/7, 2nd number: 2 21/30
2/7 + 81/30 is 209/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
2/7 = 2 × 30/7 × 30 = 60/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210 - Add the two like fractions:
60/210 + 567/210 = 60 + 567/210 = 627/210 - 627/210 simplified gives 209/70
- So, 2/7 + 81/30 = 209/70
In mixed form: 269/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7+81/30 2/14+81/30 2/7+81/60 6/7+81/30 2/21+81/30 2/7+81/90 10/7+81/30 2/35+81/30 14/7+81/30 2/49+81/30