Add 4/15 and 10/21
4/15 + 10/21 is 26/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
4/15 = 4 × 7/15 × 7 = 28/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
10/21 = 10 × 5/21 × 5 = 50/105 - Add the two like fractions:
28/105 + 50/105 = 28 + 50/105 = 78/105 - 78/105 simplified gives 26/35
- So, 4/15 + 10/21 = 26/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15+10/21 4/15+20/21 4/30+10/21 4/15+10/42 12/15+10/21 4/15+30/21 4/45+10/21 4/15+10/63 20/15+10/21 4/15+50/21 4/75+10/21 28/15+10/21 4/15+70/21