Add 10/15 and 20/35
10/15 + 20/35 is 26/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
10/15 = 10 × 7/15 × 7 = 70/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
20/35 = 20 × 3/35 × 3 = 60/105 - Add the two like fractions:
70/105 + 60/105 = 70 + 60/105 = 130/105 - 130/105 simplified gives 26/21
- So, 10/15 + 20/35 = 26/21
In mixed form: 15/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+20/35 10/15+40/35 10/30+20/35 10/15+20/70 30/15+20/35 10/15+60/35 10/45+20/35 50/15+20/35 10/75+20/35 70/15+20/35