Add 15/30 and 28/35
15/30 + 28/35 is 13/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
15/30 = 15 × 7/30 × 7 = 105/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
28/35 = 28 × 6/35 × 6 = 168/210 - Add the two like fractions:
105/210 + 168/210 = 105 + 168/210 = 273/210 - 273/210 simplified gives 13/10
- So, 15/30 + 28/35 = 13/10
In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30+56/35 15/60+28/35 15/30+28/70 45/30+28/35 15/30+84/35 15/90+28/35 75/30+28/35