Add 1/21 and 2/15
1/21 + 2/15 is 19/105.
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,
1/21 = 1 × 5/21 × 5 = 5/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
2/15 = 2 × 7/15 × 7 = 14/105 - Add the two like fractions:
5/105 + 14/105 = 5 + 14/105 = 19/105 - So, 1/21 + 2/15 = 19/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+2/15 1/21+4/15 1/42+2/15 1/21+2/30 3/21+2/15 1/21+6/15 1/63+2/15 1/21+2/45 5/21+2/15 1/21+10/15 1/21+2/75 7/21+2/15 1/21+14/15