Add 1/30 and 28/21
1st number: 1/30, 2nd number: 1 7/21
1/30 + 28/21 is 41/30.
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,
1/30 = 1 × 7/30 × 7 = 7/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
28/21 = 28 × 10/21 × 10 = 280/210 - Add the two like fractions:
7/210 + 280/210 = 7 + 280/210 = 287/210 - 287/210 simplified gives 41/30
- So, 1/30 + 28/21 = 41/30
In mixed form: 111/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30+28/21 1/30+56/21 1/60+28/21 1/30+28/42 3/30+28/21 1/30+84/21 1/90+28/21 1/30+28/63 5/30+28/21 7/30+28/21