Add 35/21 and 3/15
1st number: 1 14/21, 2nd number: 3/15
35/21 + 3/15 is 28/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
35/21 = 35 × 5/21 × 5 = 175/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
3/15 = 3 × 7/15 × 7 = 21/105 - Add the two like fractions:
175/105 + 21/105 = 175 + 21/105 = 196/105 - 196/105 simplified gives 28/15
- So, 35/21 + 3/15 = 28/15
In mixed form: 113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+3/15 35/21+6/15 35/42+3/15 35/21+3/30 35/21+9/15 35/63+3/15 35/21+3/45 35/21+3/75 35/21+21/15