Add 3/14 and 12/21
3/14 + 12/21 is 11/14.
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,
12/21 = 12 × 2/21 × 2 = 24/42 - Add the two like fractions:
9/42 + 24/42 = 9 + 24/42 = 33/42 - 33/42 simplified gives 11/14
- So, 3/14 + 12/21 = 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/14+12/21 3/14+24/21 3/28+12/21 3/14+12/42 9/14+12/21 3/14+36/21 3/42+12/21 3/14+12/63 15/14+12/21 3/14+60/21 3/70+12/21 21/14+12/21 3/14+84/21 3/98+12/21