Add 5/15 and 8/28
5/15 + 8/28 is 13/21.
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,
5/15 = 5 × 28/15 × 28 = 140/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
8/28 = 8 × 15/28 × 15 = 120/420 - Add the two like fractions:
140/420 + 120/420 = 140 + 120/420 = 260/420 - 260/420 simplified gives 13/21
- So, 5/15 + 8/28 = 13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15+8/28 5/15+16/28 5/30+8/28 5/15+8/56 5/15+24/28 5/45+8/28 5/15+8/84 25/15+8/28 5/15+40/28 5/75+8/28 35/15+8/28 5/15+56/28