Add 27/21 and 15/35
1st number: 1 6/21, 2nd number: 15/35
27/21 + 15/35 is 12/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
27/21 = 27 × 5/21 × 5 = 135/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
15/35 = 15 × 3/35 × 3 = 45/105 - Add the two like fractions:
135/105 + 45/105 = 135 + 45/105 = 180/105 - 180/105 simplified gives 12/7
- So, 27/21 + 15/35 = 12/7
In mixed form: 15/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+15/35 27/21+30/35 27/42+15/35 27/21+15/70 81/21+15/35 27/21+45/35 27/63+15/35 27/21+75/35