Add 15/21 and 4/6
15/21 + 4/6 is 29/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
4/6 = 4 × 7/6 × 7 = 28/42 - Add the two like fractions:
30/42 + 28/42 = 30 + 28/42 = 58/42 - 58/42 simplified gives 29/21
- So, 15/21 + 4/6 = 29/21
In mixed form: 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+4/6 15/21+8/6 15/42+4/6 15/21+4/12 45/21+4/6 15/21+12/6 15/63+4/6 15/21+4/18 75/21+4/6 15/21+20/6 15/21+4/30 15/21+28/6 15/21+4/42