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