Add 18/15 and 3/28
1st number: 1 3/15, 2nd number: 3/28
18/15 + 3/28 is 183/140.
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,
18/15 = 18 × 28/15 × 28 = 504/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
3/28 = 3 × 15/28 × 15 = 45/420 - Add the two like fractions:
504/420 + 45/420 = 504 + 45/420 = 549/420 - 549/420 simplified gives 183/140
- So, 18/15 + 3/28 = 183/140
In mixed form: 143/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+3/28 18/15+6/28 18/30+3/28 18/15+3/56 54/15+3/28 18/15+9/28 18/45+3/28 18/15+3/84 90/15+3/28 18/15+15/28 18/75+3/28 18/15+21/28