Add 10/20 and 15/35
10/20 + 15/35 is 13/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
15/35 = 15 × 4/35 × 4 = 60/140 - Add the two like fractions:
70/140 + 60/140 = 70 + 60/140 = 130/140 - 130/140 simplified gives 13/14
- So, 10/20 + 15/35 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20+30/35 10/40+15/35 10/20+15/70 30/20+15/35 10/20+45/35 10/60+15/35 50/20+15/35 10/20+75/35 70/20+15/35