Add 12/15 and 3/28
12/15 + 3/28 is 127/140.
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,
12/15 = 12 × 28/15 × 28 = 336/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
3/28 = 3 × 15/28 × 15 = 45/420 - Add the two like fractions:
336/420 + 45/420 = 336 + 45/420 = 381/420 - 381/420 simplified gives 127/140
- So, 12/15 + 3/28 = 127/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15+3/28 12/15+6/28 12/30+3/28 12/15+3/56 36/15+3/28 12/15+9/28 12/45+3/28 12/15+3/84 60/15+3/28 12/15+15/28 12/75+3/28 84/15+3/28 12/15+21/28