Add 27/21 and 28/30
1st number: 1 6/21, 2nd number: 28/30
27/21 + 28/30 is 233/105.
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,
27/21 = 27 × 10/21 × 10 = 270/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210 - Add the two like fractions:
270/210 + 196/210 = 270 + 196/210 = 466/210 - 466/210 simplified gives 233/105
- So, 27/21 + 28/30 = 233/105
In mixed form: 223/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+28/30 27/21+56/30 27/42+28/30 27/21+28/60 81/21+28/30 27/21+84/30 27/63+28/30 27/21+28/90