Add 3/14 and 15/21
3/14 + 15/21 is 13/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
3/14 = 3 × 3/14 × 3 = 9/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Add the two like fractions:
9/42 + 30/42 = 9 + 30/42 = 39/42 - 39/42 simplified gives 13/14
- So, 3/14 + 15/21 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/14+15/21 3/14+30/21 3/28+15/21 3/14+15/42 9/14+15/21 3/14+45/21 3/42+15/21 3/14+15/63 15/14+15/21 3/14+75/21 3/70+15/21 21/14+15/21 3/98+15/21