Add 7/28 and 28/15
1st number: 7/28, 2nd number: 1 13/15
7/28 + 28/15 is 127/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
7/28 = 7 × 15/28 × 15 = 105/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
28/15 = 28 × 28/15 × 28 = 784/420 - Add the two like fractions:
105/420 + 784/420 = 105 + 784/420 = 889/420 - 889/420 simplified gives 127/60
- So, 7/28 + 28/15 = 127/60
In mixed form: 27/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+28/15 7/28+56/15 7/56+28/15 7/28+28/30 21/28+28/15 7/28+84/15 7/84+28/15 7/28+28/45 35/28+28/15 7/28+28/75 49/28+28/15