Add 10/15 and 30/28
1st number: 10/15, 2nd number: 1 2/28
10/15 + 30/28 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
10/15 = 10 × 28/15 × 28 = 280/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
30/28 = 30 × 15/28 × 15 = 450/420 - Add the two like fractions:
280/420 + 450/420 = 280 + 450/420 = 730/420 - 730/420 simplified gives 73/42
- So, 10/15 + 30/28 = 73/42
In mixed form: 131/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+30/28 10/15+60/28 10/30+30/28 10/15+30/56 30/15+30/28 10/15+90/28 10/45+30/28 10/15+30/84 50/15+30/28 10/75+30/28 70/15+30/28